I've reproduce this issue using an affected Nightly build (2021-01-19), with STR from comment 0, running Win 11. The issue is still repo on latest Nightly 140.0a1 under Win 11.
Bug 1687476 Comment 3 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
I've reproduce this issue using an affected Nightly build (2021-01-19), with STR from comment 0, running Win 11. The issue is still repo on latest Nightly 140.0a1 under Win 11. Edited: This also repro with Standard mode in PBM.