After changing lootfilter, in location ~10-20% of random items with “show”-rule will be hidden.

The title may seem too confusing and freaking until you see the screenshot:

https://imgur.com/Zdl8kGd

— there are several instances of Breach Splinter lying on the ground, but lootfilter only highlights one of the instances.
This problem is not only with Breach Splinter, but with everything: exalt orbs, body armors, waystones, etc.

I just randomly don't have some of the items that are supposed to be displayed.

Reproduction scenario:
1. While on the map, apply lootfilter X; for example, before the Breach I applied a file with only one rule: Hide AreaLevel <= 99
2. Kill some bunch of mobs.
3. Apply lootfilter Y.
— Then you explore the location and with toggle off/on of the lootfilter you check how many "show"-items you actually didn't see (I try not to think about how many items I've missed in two months).

have the same problem since few days. incl no higlights on npc´s chests or anything in town/hideout and some micro lags all the time. no matter if i had lootfilter on or off or another use