Hi Gianky,
I have an Oculus Rift CV1 too and used it with GTX 1070 for around 2 years. Today I use it was an AMD RX 6800XT. The behavior with both screens flickering/turning off for some seconds, or maybe just one, is something I had seen twice, but I was not able to reproduce it. Some month later, while haven't used the Rift for some time, I noticed a missing sound from the right speaker. Inside the Rift there is a ribbon cable, that starts on the right side, goes around your head (right ear > back > left ear) and is responsible for audio and sensors on the back of the headset > this one was broken and it is not a rare phenomenon. I bought my Rift at Oculus when the Rift S was around the corner and luckily had warranty when it happened. After I got a new (refurbished) headset from Oculus I first fixed the right headstrap - I used black armored tape. The left headstrap is still able to move, but there is no ribbon cable that could broke. My recommendation for you is to do this as long as your CV1 is working. If you need more help, I could send you a picture that shows my Rift with fixed headstrap.
have a good flight and see you in DCS,
Carsten (Dino1981)