Bootloop, after replacing back plate, battery, mute - volume up etc.

My Iphone6 is now in crazy state. It's like Schrödinger cat.

After unfortunate accident it did bend a little, so I did have to change few parts, like: Back plate, battery, volume up-down metal plate, whole screen.

Logic board was fine.

Now It really like to reset at random, after a day or two, or after 10 seconds of usage. I tried hard reset, soft one, 2x new battery, calibrate battery, restore to original factory setting, upgrading software etc. When boot looping it's getting hot, and after a short while of working and doing some minor tasks.

What did I notice. Well, if the phone is on cable to power source (PC, charger) It's working better, sometimes doesn't bootloop at all. When battery is in rage of 50%/55%-100% It doesn't looping that much, but still that's big problem. Hard reset sometimes help for while.

Do you guys have any ideas what should I do ? Did I could misplace some small screw in assemble and cause problem ? Is this hardware or software problem ?

I've got some of logs from:

JetsamEvent

Periodic-microstackshot-report

ResetCounter

Stack

and few ForceReset