Switch of the miners often is freezing.
Step to reproduce:
1. Run startzpool.bat
2. Wait for benchmarking.
3. Close  NemosMiner and start startzpool.bat again.
Over time switch of the miners are freezing. If select (focus) main NemosMiner window and press any key then miners will be switched.
This issue reproduces on the v2.3, 2.2 works well.
