Blank display on Apple Watch Series 8 after updating to watchOS 11.5

My watch (watch series 8 GPS + cellular.. warranty expired) was absolutely working fine couple of days back, but suddenly the watch screen got blank while I am just able to see time when on hands down when I raise my hand up the display gets blank.

i updated the OS version of watch to 11.5 then the watch display shows up and working fine for a day. Then again it got blank but this time not able to see time even on hands down. Remember my watch is working fine till now, not but only thing is it’s blank.

I am suspecting the OS version causing the problem.

kindly suggest to what to do?

[Re-Titled by Moderator]

Original Title: apple watch series 8 display is blank but rest of thing are working fine