Hi. I’m running tvh 4.3 on pi. It’s been solid as a rock for ages to be honest - hasn’t skipped a beat.
Connected Hauppage directly to Vero and experienced same pixelation / picture breakup on SD channels.
I run the rpi5 headless so couldn’t check performance directly on it.
I know my transmitter has had some engineering works going on for the last few weeks (which coincided with me upgrading to August firmware) so is probably what’s causing this.
The weird thing is, when I upgraded and noticed live tv performance issues over the course of a day, I downgraded to April release and everything played perfectly again for days, so thought it had to be the newer firmware causing issues.
Anyway, having done a clean install of raspberry pi os (seems a new ‘Trixie’ version has been released) things seem to have settled a bit, although not perfect. Hopefully things will improve.