Attached is the patch to fix the RM #3630 Autocomplete broken in v3.3 release, works in v3.2. Actual issue is due to merge the pgcli code, we only consider "pg_catalog and public" schema's which I have fixed.
Can you add a unit/API test for this please (ideally not another feature test, as we already have some for autocomplete)?
We are waiting for pytest to be introduce in pgAdmin4, pgcli have API test written in pytest.
That could be a very long wait. It seems unlikely that will proceed.