Drivers are ok, as I said I am using Phoenix Miner after Claymore ended and still using him on severals rigs with v5.8x without anny issue and for updates I just copied old bat file into directory of new version but since v5.9 it is not working like that. In this moment I am ok with v5.8x since I am using old card GTX 1070TI and few RTX 2070 but I wanted to try new version to be prepared for future needs in case I add some newer cards RTX3 or AMD RX66xx...
It is possible that there is a bug in the new version(s) but we really need the Windows version, and the Nvidia driver version in order to be able to reproduce the problem, and then fix it. You could also try to run the miner while only listing the available GPUs, then post the results here along with Windows and driver versions:
PhoenixMiner.exe -list