I don't know why it works for us and not for you.
I can try listing what I do, if it helps:
- I use Chrome
- I set flash to low quality on the Click to Start screen
- this is what I set in the Pref screen after each maintenance reset:
note that voices are disabled, could the problem be a Victory Phrase from one of your girls?
- I play with Fast Forward combats and AutoRun.
Now, for the stamina lost, this week I discovered this: before, if I chose the wrong mission or squad, I could just refresh the page before the first combat, then reload to the game screen without stamina loss.
Now, I lose that stamina, don't know if they changed the counter or because the game takes longer to load.