In LibreCalc, there is a bug in the markdown used within comments. Any hyphenated word will remove all hyphens and will stirke-through the whole comment.
Steps to Reproduce:
1. Right click on any cell
2. Click "Insert Comment"
3. Write any sentence with a hyphen, e.g., "-15: Temperature needed for cool-down"
Notice how the first hyphen before "15" is removed, the hyphen between "cool" and "down" is removed, and the whole line is marked as strike-through.
A comment that just says "-15: Temperature needed for cool-down" with no bold, italics, or strike-through in the comment whatsoever.
User Profile Reset: Yes
OpenGL enabled: Yes
The call it a feature ;-)..
Menu Tools -> Autocorrect -> Options -> and uncheck Automatic *bold* ...
But it's in discussion to change the default to off
*** This bug has been marked as a duplicate of bug 133023 ***