Jasmin Rašljanin

Probably, after the last update on my lg UP75, horizontal wave lines appeared when broadcasting 1080i resolution. There is no interference with progressive resolution. Can an upgrade be expected?

I recently bought a UHD tv 65UP75003. I'm not sure, but I think there was a problem after the software upgrade. The TV is connected via an HDMI cable to a DTV receiver that sends 1080i resolution and the problem is in the horizontal line that travels from top to bottom. The line is not visible at progressive resolution. What I did: Reset the TV, receiver, bought a new high speed HDMI cable ...
Please help and what to try next?

https://photos.app.goo.gl/tyjifdpGLFAXmKd88