When will "Uncollected Garbage" be deleted?

There have been no gaps in the reports from the satellites in the last 10 days. The space is really occupied on my hard disk

df -H /mnt/storagenode4/
Filesystem                     Size  Used Avail Use% Mounted on
/dev/mapper/storagenode4-node   16T   16T   83G 100% /mnt/storagenode4

The node was really full with real data in the first half of the month and then the TTL kicked in.

How is this backlog handled after a node restart? it seems that there is no backlog on my node anymore after I restarted that node several times this month. And shouldn’t have the bloomfilter taken care of this today regardless?