Mouse pointer jumps up vertically when selecting text

[Frogperson]

Describe the bug
When selecting text, the selection immediately jumps up several lines. Releasing click correctly brings the cursor back down to where it should have been, and my selection ends up being correct. It's only while dragging that the selection is offset.
I've tested on both Flutter 3.28.0-0.1.pre and 3.29.0-0.2.pre.
This issue does not happen if readOnly in the CodeEditor is set to true.

To Reproduce
Steps to reproduce the behavior:

1. Install the latest Flutter beta
2. Run the example project on web
3. Click and drag to select text
4. Notice how the text selection jumps up

Expected behavior
Text selection should exactly follow my cursor while dragging

Screenshots

[alsemitoo]

I have also encountered this issue, but only in EDGE and Chrome. In firefox however, this issue seems to not happen. If you find any solution please let me know!