Someone, please confirm if you are also having this issue. You can see white lines at the top in the picture below:
It happens only in some channels like the ones I have mentioned. This happens only if we switch from any other channel to these and not when we switch between these channels. For eg, if we switch from say DD national (148) to DD Kisan (152) thease lines appear and if we switch to SS3 (306) from DD Kisan (152) these lines don't appear. Don't know what's the issue.