Theme from Master are not shown in Slide pane

The formatting from the Master is shown in slide show but not in slide pane or while editing.

Please provide more details and share a sample file, possibly a screenshot. - Cheers

This is a shot of impress in editing mode. It shows as if no template was chosen in the Normal view nor in the slide panel.

This is a screenshot when the slide show is running. I can see the template applied properly:

Just a guess: What happens if you change from dark mode to light mode?
If this does not help you should share a sample file containing the problem. Screenshots don’t help further… - Cheers

No change happened.
I am attaching a file I created with one slide and I applied a template to it.
Same problem.
no_format.odp (22.3 KB)

I can’t see that problem (see screenshot):

Try out Restart in Safe Mode… (menu Help) - result?

Version: (X86_64) / LibreOffice Community
Build ID: 420(Build:2)
CPU threads: 2; OS: Linux 5.15; UI render: default; VCL: gtk3
Locale: de-DE (de_DE.UTF-8); UI: en-US
Ubuntu package version: 4:24.2.3~rc2-0ubuntu0.22.04.1~lo1
Calc: threaded

Version: (X86_64) / LibreOffice Community
Build ID: 4f88f79086d18691a72ac668802d5bc5b5a88122
CPU threads: 20; OS: Linux 6.5; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded