Your issue may solely be that you are using a very old HMU (Oculus Rift DK2)
Let us take a look at this internally and we will get back to you with an answer.
Don't think that age got anything to do with it since I'm using Rift S
This problem have been going on for some time.
There is another thread about it so there is many others having this issue
GTX 1080 ti
16 GB RAM
Oculus Rift S