We have Shaw BlueCurve in our house.  On one of the TV's, the image flickers for the first couple of minutes and then works fine.  I think the problem is getting worse as it used to "go away" when we went to guide or changed channels or turned it off/on with the remote.  We've tried unplugging the box and plugging it back in but it didn't help.  The box was installed in Jan 2020 and the issue has popped up in the last 2-4 weeks.

Anybody else have this issue?