This is just a dumb thing. You use your beackup, stard driving, and then little Billy appears with his 0.5 K/D and spawncamps you with CAS.
As long as you did not hit a tank while you are in your spawn zone and you die, you should not lose your backup.
It’s frustrating but I have plenty of backups so I don’t worry about it. I never pay for backups, it’s a huge waste. In general, when I die, I play a different vehicle each time.
Neither do i.
I mostly use it when i have a high % booster and i play a stock tank that’s especially trash at stock (so basically every US tank with a 75, 76, and 90mm guns xd).