# Tenzir Node v5.22.2

This release fixes a performance regression when parsing lists with mixed-type elements, where batch processing was inadvertently broken. It also resolves an assertion failure that could crash Tenzir when encountering events with duplicate keys.

## 🐞 Bug Fixes

### Fixed assertion failure when encountering duplicate keys

Dec 19, 2025 · [@IyeOnline](https://github.com/IyeOnline) · [#5612](https://github.com/tenzir/tenzir/pull/5612)

We fixed an assertion failure and subsequent crash that could occur when parsing events that contain duplicate keys.

### Improved Type Conflict Handling

Dec 16, 2025 · [@IyeOnline](https://github.com/IyeOnline) · [#5612](https://github.com/tenzir/tenzir/pull/5612)

We resolved an issue that would appear when reading in lists (e.g. JSON `[]`) where the elements had different types. Tenzir’s type system at this time only supports storing a single type in a list. Our parsers resolve this issue by first attempting conversions (e.g. to a common numeric type) and turning all values into strings as a last resort. Previously this would however also break Tenzir’s batch processing leading to significant performance loss. This has now been fixed.

[ Download on GitHub ](https://github.com/tenzir/tenzir/releases/tag/v5.22.2)

[Get the release artifacts and source code.](https://github.com/tenzir/tenzir/releases/tag/v5.22.2)