Trados Studio Freelance 2017, with all updates

I have a big TM, great autosuggest dictionaries, great termbases, fragment matches turned on and set. Everything turned on, tuned like I want it. I made no changes to my settings that I have been using for months now (and they worked fine), but a few days ago the AutoSuggest (and the autocomplete from the termbase) is acting erratic. It doesn't suggest words that I know it should, and even suggestions from the termbase are entirely erratic (more often not autocompleting the words than yes). In other words: when I type, the word from the termbase/fragment match/autosuggest dict (depending on the priority I set) should appear, I press Enter, and it is inserted. This is not working correctly now.

I tried playing around with the settings, but to no avail, and now even the old settings don’t return the same results as before. I also restarted Trados as an admin, restarted the PC, but nothing. There have been no updates to my antivirus since then. Windows was updated, but these updates shouldn't affect Studio's offline performance, right?