Hello Donncha,
so can you make sure the garbage collector cron is scheduled in the next version? We are not sure if there should be an option to disable it at all.
Hello Bira,
we had similar issues - just check your WP Super Cache Advanced settings and see if there is a "Next scheduled garbage collection will be at" message below "Expiry Time & Garbage Collection". That will give you an idea if your Garbage collector is running.
Thanks,
Martin