Random power phase dropouts of right pedal - rally xc200

Lately I've noticed random dropouts on cycling dynamics. The 5 sec or 1 min cycling dynamics indicate "there was a problem with your power meter data" and "right balance - no power data ". On the graph I can see big gaps on right power phase and smaller gaps on left power phase.

Sometimes I get error 128 or 1024 when calibrating. I changed batteries at least two times and measured them with volt meter. Last batteries were duracell cr1 3n.

I noticed the issue started appearing roughly after putting new batteries.

Today's activity connect.garmin.com/.../17207020783

I tried riding with cycling dynamics data screen on my Edge and while most of the time I get power phase from the left pedal I get no power phase from the right pedal. Once in a while I'll get info from the both pedals for a few seconds or seldom only from the right pedal. I just get watts (from both pedals) and PCO from both pedals. I haven't noticed dropouts in watts or cadence.

I already tried cleaning the contacts with isopropanol, unlinking and re linking the right pedal, resetting angles but no change.

Anyone else who has this issue?

Edit: I talked to Garmin chat but they could not figure out the problem. What's weird is that only PP goes missing. PCO, power and power balance tracks normally.