How to reproduce:
1. Open a File in Adobe Acrobat Reader (Continuous Release 2025.001.20474, Windows 10)
2. Add a comment via Tools -> Add comment -> Left-click on file
3. Add text to comment.
4. Add a unicode-character by pressing and holding ALT and typing the number, e.g. 8746, thenreleasing ALT.
5. Add more text.

The text after the unicode character (step 5) has a changed font. Expected: The font of the text from step 5 has the same font as the text from step 3.

Workaround: Copy-Paste the unicode character from somewhere else. The font does not change for pasted characters.