phone not bent.
also can remove the app vault liao
well my screen was bent slightly so i'm not sure if it's due to that
in any case, mine started out as random restarts whenever the phone is in my pocket for a while. it eventually grew into power outages as i described, where it suddenly loses power and stays that way until i do something physical to it such as shaking or knocking it. during these power outage periods, plugging in the power cable doesn't charge it either.
i got it repaired by xiaomi china (through the shop i bought from in sg). they did it without charging me so it may not be related to bending at all. i'm simply told it's motherboard damage.
in any case, keep an eye out for your phone's condition aggravating. don't treat it as simply random restarts, in case it's the same issue as mine.
i totally ignored mine because i thought it was just restarts, no rush to fix it. mine just one day turned off in the morning on my way to work and for like 12 hours refused to turn on. luckily that night after some aggressive negotiations i somehow managed to turn it back on for 1 hour to backup my app data and whatsapp before it died for good thereafter.
i sent it back for service immediately.
i could very well have lost all my data that day. be careful with your "random restarts".