Heewing T1 servo's keep dying

I have a problem where my servo’s on the Heewing T1 Ranger VTOL keep dying. Im running the Matek F405 VTOL FC. Channel 1-4 is set up as DShot600 and the rest 5-12 is set to PWM. My SERVO_RATE is set to 50Hz and they’re running on 5V.

There is a lot of jitter on the ailerons, but also the servo in elevon is dying. They’re getting kinda hot on the bench when testing.

Do i have a problem or do they just need some cooling when flying?

Cheers
Jan