Puzzle Rush Slow Processing?

I start to play puzzle rush, and everything seems to be fine, but after maybe ten attempts it starts to slow down, and after more a lot. What I mean by slowing down is I complete the puzzle in less than a second, but it wastes 4+ seconds wating for the next puzzle. Now, it's fine if this happens every once in a while, but for me its been happening almost every alternate puzzle. Is there a fix to this problem? I don't think it is internet speed-based or browser based (tested both, speed test says fast and different browsers have same problem.)

same

Same

Same ... I tried clearing cookies and reloading browser which worked ... but the problem keeps happening now and again

Same

Same and it is even more common on mobile

exactly

Yep ... happens a lot on mobile!

Your net is slow.

Internet speed is, according to the computer test "high". Is there another reason?

I do the same, it works for one puzzle rush but then comes again. I don't want to reload puzzle rush everytime.