Sleep wake problem on Macbook Pro

My Macbook Pro was recently upgraded to Catalina. Since then, I have a problem that my system doesn't wake from sleep, if I leave it for a while without working. I have to press the power button to force shut down and then start again. It shows the error report as 'Power button pressed during wake transition after **** ms' every time I re-login. I am not sure what is the issue and how to fix this. Any suggestions would be appreciable !!!