Now, I’m having a hard time replicating the issue 
I’m trying to pay attention to my action on the forum and see what is triggering the jump, but for the past day, I have not seen anything. Maybe Chrome was the problem ?
I tried the official PWA, and it’s going fine, also.
I don’t want to waste your time for the moment, I will keep an eye for this issue on my end, and make test with our theme components and plugins if it shows up again. Thanks 