I added a fridge (couple of years old but new to me) to a circuit three months ago. The 20 amp circuit had two exterior ceiling fans rarely used and two pendulum lights in kitchen. Have not had any issues with the lights until yesterday. Two days ago I Took out drywall on back of the wall of the dimmer switch that controls the lights. Was able to pull off with out any real banging. Next day noticed light flickering and even Temporary loss of power maybe 20-30 seconds with nothing and then popped back on (breaker didn’t trip). I worried I had a loose wire from working on the wall but don’t see anything disturbed in dimmer. And lights stay steady when I jiggle and test connections. I checked all connections mad when adding fridge and all are tight. I then found that if I remove the fridge the flickering stops. So I think that’s the culprit but when I but the fridge on a separate circuit with 6 can lights no issues everything holds steady. Any ideas on what to check next. If/when I add the fridge back to pendulant lights the flicker starts again.

Thanks for any advice