# Tenzir Node v5.21.2

This is a bugfix release that fixes timestamp handling in the python operator and the backpressure handling in publish and subscribe.

## 🐞 Bug Fixes

### Fixed pubsub back-pressure

Nov 28, 2025 · [@IyeOnline](https://github.com/IyeOnline) · [#5587](https://github.com/tenzir/tenzir/pull/5587)

We fixed a bug in the back-pressure propagation across `publish` and `subscribe`, that could cause pipelines to stall.

### Fixed timestamp handling in the python operator

Nov 28, 2025 · [@tobim](https://github.com/tobim) · [#5581](https://github.com/tenzir/tenzir/pull/5581)

We addressed an issue that caused the python operator to fail when it received data containing timestamp values.

[ Download on GitHub ](https://github.com/tenzir/tenzir/releases/tag/v5.21.2)

[Get the release artifacts and source code.](https://github.com/tenzir/tenzir/releases/tag/v5.21.2)