In click activity, only fields which are visible(fields which are in the bottom of the screen ) on the screen are getting executed even when simulate click is checked. This issue occurs randomly
Can anyone let me know what the issue may be?

show me an error message of ur issue?

Enable The sendwindowmessage property instead of simulate click and try once
Also the waitforready property as Complete

That would work for sure
Cheers @nole_1