'' Does anyone have any suggestions to fix these issues? ''
 
I assume any software can be buggy   like a new release that's not  been tried and proven  . as stated  ''as is ''
 
By choosing to download the software, you affirm that EVGA PrecisionX is supplied "as-is". EVGA Corporation assumes no liability for damages, direct or consequential, which may result from the use of EVGA PrecisionX.
 
all I can say is go back to the last revision that you know was working fully and well with your card 
 
you said this at first   '' I have been using Precision X for quite some time (several versions) with no issues on my GTX 980Ti ''
 
then this  ??   '' I suppose I could try and find a version that's older and worked properly '' 
 
hard to delete good working programs  and loose them  cause like now you never know when the need to fall back on one  pops up  .  
 
looks like evga DONT archive  any of the older downloads  past  xoc   included ?  [shame ]   [ I thought xoc was for pascal only at one time  ? ]  so maybe there still issue with older series ?
 
EVGA Precision X Version History
 
https://www.evga.com/precisionx/
 
this is the one I use with my 980ti  Precision X 5.3.11  seems to work well with out issue 
 
weather or not 3ed party sites are safe to download it  ????
 
there are the later release  down to 6.0.0   you can get  from the evga download page  any of them below that  cant click on or get
 
if nothing else go to afterburner   most prefer it anyway 
 
good luck