multi-line code completions for the inline assistant seem to write tokens & lines of code in reverse order

[kurtbuilds]

Summary

This is easiest to show with a screenshot:

I'm working on an application that has a notion of "dispute" objects, and "messages" that comprise back and forth on the dispute.

I asked the inline assistant this prompt:

create a serde struct that contains a dispute and a message, and then have this function return that struct

and the code is spit out is reasonable, except that it seemed to spit out the tokens and lines in reverse order. This is what happens visually as well: as LLM output is received, the tokens are appended at the start of the previous tokens instead of the end.

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This doesn't always happen, so something about the index or data structure/file positions for the file is somehow getting corrupted, where the insertion happens as described. As a comparison, opening a random other file in the codebase, and using the same prompt gives more sane results:

Zed Version and System Specs

Zed: v0.175.6 (Zed)
OS: macOS 15.3.1
Memory: 128 GiB
Architecture: aarch64