loot filter is not working

this is a general report - a loot filter can be selected, but its results appear to be random. For example, hiding everything or showing everything.

[edit]
This actually is not just loot but it is all labels for interactive objects including chests, urns, etc. etc. I have rolled another character and loot/labels behave correctly. The problems with the other character all began after I wrote and installed a loot filter (possibly containing incorrect item classes). After using it for a while, the problem behaviour manifested.

More detail:

With a loot filter containing one line which says "Show"
This behaviour is the same with or without this filter active.

Disappearing loot+labels.
1. Loot remains visible for four or five seconds.
2. Then it disappears.
3. Loot and labels reappear if you mouse over them.
4. Loot is visible whilst Alt is pressed.

Loot Filter.
1. Loot filter commmands do not work.
2. The results appear random.
3. Irrespective of the filter commands, either all loot is visible or none.

Try using neversinks loot filter.

https://github.com/NeverSinkDev/NeverSink-PoE2litefilter/releases/tag/0.1.1

Im also having this issue even with Neversinks filter. None of the filters I use show the items properly but the colors appear to work.

Exact same issue here.

If you experience this issue, make sure this is checked: Options > Interface > Always Highlight

Changing or disabling loot filter does not fix this issue.