Undo after changing paragraph style causes text deletion and forgets undo history
Categories
(Thunderbird :: Message Compose Window, defect)
Tracking
(Not tracked)
People
(Reporter: jhg, Unassigned)
Details
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0
Steps to reproduce:
In HTML compose window, with style Paragraph selected
1 Type several lines of text separated by ENTER (i.e. multiple paragraphs)
2 Make several changes on multiple lines (i.e. add a character at the end)
3 Verify that those changes can be undone and redone (CtrlZ, CtrlShiftZ)
4 Place the cursor in the first line
5 Select style Heading1
6 Undo
Actual results:
- The first line of text disappears
- The undo history is forgotten; pressing Ctrl+Z now has no effect
This about 90% reproducible. Some combinations of typing, style changes, etc exhibit correct behavior. I haven't been able to find a 100% consistent way to reproduce this.
Expected results:
The Heading1 style application should have been undone with no effect on remaining undo history.
This is likely a Core:Editor bug. Can you reproduce with Firefox alone at https://www-archive.mozilla.org/editor/midasdemo/ ?
Description
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