The problem

Going to Sources > Manage Excluded Items... > Presets and selecting "All Cache Files", Flatpak application caches are still included in backup.

Requested Solution

I have a proposal on this commit to my fork of the project. I've tested this by adding the proposed changes to the "Raw" exclusion patterns tab. I'll send a PR if you're happy with that.

Excluded directories:

• *Cache dirs (though listed without a wildcard to avoid greedy matching);
• .ld.so library linking cache;
• tmp dir.

I've tested removing them from a few few Flatpak apps and they regenerated these without issue.

Alternatives

One can manuall enter the filters on the Raw exclusion patterns.

Additional context

None.