Steps to Reproduce:
1.In a .pptx I have a simple text/image overlay.
2.Select the image and set color mode -> watermark. Works as expected.
3.Save (pptx) and reopen.
The watermark setting is reset back to opaque for the image.
The color mode setting sticks after save/reopen cycle.
User Profile Reset: Yes
Build ID: Gentoo official package
CPU threads: 4; OS: Linux 5.2; UI render: default; VCL: x11;
Locale: en-US (en_US.utf8); UI-Language: en-US
Created attachment 156521 [details]
Sample .pptx exhibiting issue
It seems like a duplicate of bug 127901, and it's fixed in LibreOffice 22.214.171.124.
Please retry with that version
*** This bug has been marked as a duplicate of bug 127901 ***
Can confirm fixed with 126.96.36.199 :D