I can reproduce this locally.
Bug 1809567 Comment 12 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
I can reproduce this locally in a release+debug build on changeset c44f0d09630a (2024-2-2) using grizzly.replay.
I can reproduce this locally on x86-64 Fedora 37 in a release+debug build on changeset c44f0d09630a (2024-2-2) using grizzly.replay.