There are too many issues related to thumbnails, so I'm making this metabug.
You've used this metabug to group all of your own bugs that are related to thumbnails in any way. This is not what KDE uses metabugs for. They are more narrowly focused, and include bugs from all users, not just one. If you want this metabug to be considered, you need to do these things. 1. You must make a good faith effort to find *all* open bugs related to the metabug focus, from all users, not just your own. Add those bug numbers to this metabug. I'd strongly recommend not going back more than 1 year as many older reports may not be reproducible anymore. 2. For your own issues, make sure you've included your system information, as asked for in the bug report template. Bug 497706 for instance, does not have this information. 3. For your own issues that were created over 6 months ago, make sure you can reproduce them on Plasma 6.7.2 and current versions of software Thanks for understanding.
Basically, metabugs are for the benefit of developers; they make it easy to find related issues in the same codebase, to make them easier to fix en masse. This falls apart a bit if bugs are grouped by a user-facing criterion (e.g. "thumbnails") rather than a technical criterion (e.g. "the thumbnailing process itself" or "desktop files"). This can be tricky to do if you don't know the underlying technical details, but in time, you'll figure it out.
๐๐งน โ ๏ธ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME. For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging. Thank you for helping us make KDE software even better for everyone!
๐๐งน This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.