Description:
    Before, if I changed the font color and later decided I wanted to change it back to the original font color, I would highlight the text and choose the original font color. Now, it doesn't work. Parts of the text will change to the original font color, but other parts will remain unchanged. To make matters worse, as I try to change the text that was never corrected, some of the text that had been correctly changed will go back to the font color that I no longer want.
    Another problem occurs if I bold some text or make it italic, and later decide I want to change it back to the original state, I get all the same problems I mentioned for changing the font color. In the prior version, I could simply select the text I want to change back and then hit BOLD or ITALIC, and the fix would work. Not anymore. Parts of the text will be corrected, but other parts will remain uncorrected.
    This occurs when I am creating and modifying text documents. Before this recent update, I was very happy with the application, but these errors are ruining it for me. They are so bad, I am thinking of trying to find an alternative application to create text documents, which is horrible for me, because I loved LibreOffice before.

Steps to Reproduce:
1. Create a text document. Add some text. 
2. Change a selection of the text to a different font color. Change another selection of the text to BOLD. Change another selection of the text to an ITALIC  font. Finally, change some of the text to be UNDERLINED.
3. Now, try to reverse those changes. In the earlier version I was using, it was a simple matter to select the text I wanted to change back, and then hit the font color I wanted, or hit BOLD to get rid of the BOLD text, or hit ITALIC to get rid of the ITALIC, or hit UNDERLINE to get rid of the underlined text. It doesn't work anymore. 

Actual Results:
Isn't that what I just did in STEPS TO REPRODUCE? 

Expected Results:
I am unable to reverse changes I made to my text. If I change the font color and later try to change it back, parts of the text will be corrected, but parts of the text will remain uncorrected. Likewise, if I BOLD text, or make text ITALIC, or UNDERLINE text. In every case, if I try to undo those changes, part of the text is corrected, but part of it remains uncorrected.


Reproducible: Always


User Profile Reset: Yes

Additional Info:
It is self-evident. I try to reverse a change I made to a selection of text, but parts of it are changed and others remain the same; that is unchanged.

I don't know what version it is, but I found this information under Version in my LibreOffice Help: 
   Version: 25.8.0.4 (X86_64)
   Build ID: 48f00303701489684e67c38c28aff00cd5929e67
   CPU threads: 8; OS: Windows 11 X86_64 (build 26100); UI render: default; VCL: win
   Locale: en-US (en_US); UI: en-US
   Calc: threaded