Youtube video become blur or black !(in ipad)

whenever i close app(not from recent) and open another app and when i came back my youtube video become blur and black but audio still plays,i reinstalled app 3,4 times but problem still persist ,every time it happens i have to reload the website to solve it.some one help or i have to switch to another browser

Same issue. Driving me crazy. i wonder if in settings having audio enabled in background feature could be contributing?