Problemsby GlyphPrefect upgrades break working setups
15 posts from 14 people11d activeFading, +0 this week
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The posts behind it
Schema form timezone changes apply the offset twice and shift datetime values
### Bug summary In the React UI's schema form, changing the timezone of an existing datetime changes the instant submitted by the form. `SchemaFormInputStringFormatDateTime.handleTimezoneChange` calls `toZonedTime` and then passes that shifted `Date` to `formatInTimeZone`,...
`wait_for_flow_run` can return a non-final state after a terminal event
## Description `wait_for_flow_run` is documented to return a finished flow run, but it can return a run in a non-final state when the read after a terminal event sees an older state. This can cause a parent flow to report a successful child as unfinished. This issue and its...
PrefectDistributedFuture.result() hangs after its task run completes if the task run waiter lost its events subscription
### Bug summary `PrefectDistributedFuture.result()`, the future returned by `Task.delay()` and `Task.apply_async()`, can block forever after its task run has completed. This happens once the process's `TaskRunWaiter` has lost its events subscription....
Allow dismissing the V1 UI sidebar shortcut
...V2 with both UI bundles available. The sidebar footer shows the switch action and offers no way to hide it. A component regression that attempts to dismiss the shortcut fails because no dismiss control exists; the existing nine sidebar tests pass. ### Proposed change Add an...
Preserve cron start bounds across DST folds and gaps
### Problem On Python 3.13+, timezone-aware cron generation can return dates before its requested start during a fall-back fold, and can skip a still-upcoming occurrence shifted out of a spring-forward gap. ### Reproduction For `CronSchedule(cron="30 2 * * *",...
Perpetual Jobs Using Prefect
### Describe the current behavior Collision Strategy = CANCEL_NEW still creates a job schedule and cancels it. Those lifecycle steps are not required for continuous jobs. Even with concurrency = 1 these jobs are getting scheduled ### Describe the proposed behavior If there is...
EventTrigger with threshold > 1 should expose all contributing events in {{ events }}
## Summary When an `EventTrigger` fires because its `threshold` is met, the Jinja action template only has access to the **last** event that pushed the count over the line. `{{ events }}` contains a single item regardless of what `threshold` is set to. This is inconsistent with...
Async `pause_flow_run` returns `None` instead of the run input when a pause with the same key is rejected
### Bug summary In an async flow, calling `pause_flow_run(wait_for_input=..., key=...)` a second time with the same key returns `None` instead of the input that resumed the first pause. Output, run against a local `prefect server start`: Expected `second:...
`task.map()` passes the `FieldInfo` object for an unmapped parameter declared with `Field(default=...)`
### Bug summary Since 3.8.8 (#23228), a task parameter declared as `y: int = Field(default=3)` receives `3` on a direct call and on `.submit()`. Under `.map()` the same parameter still receives the `FieldInfo` object, so any use of the value fails. Output on 3.8.8: | Call path |...
Pinned commit_sha not checked out when the git checkout already exists
### Bug summary `GitRepository(commit_sha=...)` does not check out a new commit when the destination directory already holds a checkout. I hit this with a `git_clone` pull step in a persistent working directory: after updating the deployment to a new `commit_sha`, runs kept...
MattermostWebhook silently ignores the configured botname
### Bug summary `MattermostWebhook` has a `botname` field in the block form, but the value never reaches apprise. Every message goes out under the apprise asset name instead of the configured one. The field is accepted, persisted on the block document, and dropped at send time...
Failed async tasks with `persist_result=True` do not persist their exception results
### Bug summary With `persist_result=True`, a failed async task's original exception should remain retrievable after its state is reconstructed through the API. The immediate Failed state re-raises the original exception, but the API-reloaded state contains result metadata...
Improve dark-mode readability of V2 run lists
### Bug summary V2 reduces run-name size and secondary-text contrast on flow-run cards in dark mode. In a comparison using the same data and viewport, muted text contrast decreased from 7.49:1 in V1 to 5.78:1 in V2: both use `#adadad` text, but V2 uses a lighter card background....
Migration bad1e352c597 skips an INVALID ix_event_resources__occurred left by a cancelled CREATE INDEX CONCURRENTLY and never repairs it
### Bug summary The PostgreSQL migration `bad1e352c597` (`2026_06_10_000000_bad1e352c597_add_event_resources_occurred_index.py`) runs in an autocommit block. When that build is cancelled (statement timeout, lock timeout, pod restart, two server replicas racing...
Concurrency UI maxes out at 200 entries
### Bug summary Concurrency UI maxes out at 200 entries. Pagination cannot go past 20 and filtering is only applied frontend side meaning all entries after the 200th cannot be seen in the ui (even when filtering). ### Version info ### Additional context _No response_
Companies and products named
About this problem
Evidence
15 posts from 14 people in 1 place, about 2 a week over 60 days. Mostly on PrefectHQ/prefect. Tools named alongside: GitHub, PostgreSQL.
Frustration Frustration 0 of 3· Seen on GitHub issues
How it was grouped
Posts that state a pain and match the "breaking-changes" rule about Prefect. First post Sep 1, 2026, latest Oct 30, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method
The same problem elsewhere
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25 posts from 25 people on GitHub issues, Reddit, Community forums.
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25 posts from 2 people on GitHub issues.
Other Prefect problems
Prefect users keep filing bugs
Top post: "Preferred way to cite prefect", one of 20 posts from 17 people on GitHub issues.
Trouble with Prefect flow
Top post: "Flow run graph polls graph-v2 every second for the whole run, rebuilding the full graph each time", one of 14 posts from 11 people on GitHub issues.
Trouble with Prefect deployment
Top post: "`prefect deployment delete --all` leaves deployments behind when there are more than 200", one of 2 posts from 2 people on GitHub issues. Unverified.
Trouble with Prefect missing
Top post: "V2 UI feedback: Missing feature - Filter by tags search box", one of 2 posts from 2 people on GitHub issues. Unverified.
Prefect rate limits and usage caps block work
2 posts from 2 people on GitHub issues. Unverified.
Trouble with Prefect deployments
One post on GitHub issues: "(ui-v2) Quick Run from deployments list navigates away when selecting from enum dropdown". Unverified.
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