I had 6.6.1 and with the reflash, updated to 6.6.10.
Since I had those errors, I havent experienced the same again. I will see in the future, if they start to do the same.
I am testing them heavily. It also worth to note, that they were not fitted in their final position, the connection might had been a bit hefty.
Right now they are properly fitted and enclosed, lets see.
Thank you for your support!