I use Switch Bindings to turn bind 3 way Inovelli ZWave light switches. Also, I reboot my hub every other day to cut back on the slowdowns.
I've noticed that Switch Bindings takes a while to respond to button presses after a restart. Typically, Switch Binding takes about 500ms after the switch is pushed. However, right after a restart, it typically takes about 7s. It almost feels like the app doesn't actually get initialized until the first button press.
Please help look into this. I had a very similar issue with the ABC app and the author was able to fix the app to initialize on a restart.