[Q] P760 bricks and bricks after custom-rom topic

Hello all, i will try to keep it short and hope, somebody can help me.

Got a P760 with the v20o - Stock Rom.

I´d rooted the phone and try to install a custom rom (used rammars and nameless, both 4.4.4)
adb oem-unlock...entered fastboot ( entering the fastboot means the bootloader is unlocked,right?).
Flashed twrp ( the normal one, not the 2nd-init)
> reboot.

Entering twrp, wipe , install rammars or nameless rom and Gapps. Phone is rebooting and everything works fine.
Like i said, the phone works fine but after some manual reboots the phone bricks!

If i just reflash the TWRP recovery(not the whole custom rom,just the twrp.img) the phone boots again without problems and still on my new custom rom, but some manual reboots later the phone bricks again.

I´d repaired the phone with the lg update tool too and did all the procedure again, used CWM and not TWRP, but the same **** happen.
So i can´t use the Phone because im sure it will brick again, its very annoying and frustrating because i tryed differeten custom recoverys, different roms but theres no way, the phone will brick again!

Is there anything i do wrong? Because i read a lot and i dont get the point why the phone bricks and bricks... with brick i mean the phone stucked to the LG-Bootlogo and nothing happens.