version 1.2.10
Now the hashrate seems be stable after switching, but....no shares...So, after switching back to my pool there are no shares to it, while cards are mining well.
It must be your pool, then. Which coin are you mining at which pool?
Confirm this problem on some pools, zpool and mine, in both tested Neoscrypt, after some time workers disappear at pools, but app still works and load GPU 100%