Please check if the info in this post help, both the link with the hints on autostart, but also the suggestion on the possible problematic widgets (if you have your own widgets, you could start removing them all and if the problem is solved add one by one to find the problematic one).
In addition to that, you could make sure that your system is fully up-to-date (I see the kernel is a bit outdated) and just in case perform a full btrfs balance.
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