I've wondered the same thing. It seems to only happen on mobile browsers, and on both iOS and Android. I wonder if people who are logged in are subject to the same?
It seems to happen at least much less often when logged in.
But yes, it is by far the jankiest thing I've ever seen in a supposedly serious tech company. No idea what failure has allowed that to happen for so long, it seems to be a permanent feature at this point.
