Yes, download the build of your choice from here:
and flash via TWRP. You can and should do without wiping data.I recommend to start reflashing the current build. Afterwards, try an older build. Only choose, to be on the safe side, the option to clear the cache & dalvik after flashing.
Make sure to use the proper build flavor, variant B has the string "microG" in its file name.
Your symptoms sound really weird...
Oh, one thing I could think of, BTW - if that is it, then manually reflashingthe current build should solve your issues - before I explain the background, just answer the following question:
Was that the first OTA update, after you had installed Magisk?
Yep, after flashing Lineage I installed Magisk immediately. Then I've been installing the OTA updates for months without issues, until yesterday.
I will try re flashing this version on TWRP and I'll let you know what happens. Thanks for all your help.