Description:
I wrote a string of several characters ⚫ (U+26AB) in the line, alternating with different colors. By setting the background color of the lines to one color of characters, I wanted to make some characters disappear against this background, so as to simulate the spacing of exactly the width of the characters. Unfortunately, with the release of some new version of Libreoffice Writer, this effect is incorrectly displayed in the editor. However, interestingly, after exporting the text to a PDF file, the effect is correct. In my opinion, this indicates some small mistake in the part of the program responsible for displaying the edited text on the screen.
I have attached a sample file "test Libre Office.odt" and created via "Export as" --> "Export as PDF" file "test Libre Office.pdf".

Steps to Reproduce:
1. In Libreoffice Writer write a line of characters, for example:
AAAAA⚫⚫⚫⚫⚫

2. Set color of each odd character to red,

3. Set color of line background also to red. All odd "A" letters disappear, but all circles are still visible. You can save document and reedit - effect is the same.

4. "Export as" --> "Export as PDF" - all odd characters in the PDF are invisible.

Actual Results:
The ⚫⚫⚫⚫⚫ characters do not recolor

Expected Results:
The ⚫⚫⚫⚫⚫ characters should appear in set character color


Reproducible: Always


User Profile Reset: No

Additional Info:
Charactes on screen in editor should appear in set color.