As a dev, how can you work with a teamlead that second, third and 4th guesses your decisions?

Simple example: fixed a bug, but temlead was shitting bricks about some error. Did a thorough research and told him that that error message was already in codebase for years and can be safely ignored because there is no workaround. Main thing is that our solution is working and I followed the latest standards. Basically I had to advocate for myself. Fine. Shit happens I get it. But it seems that this is becoming a pattern.

Then I had to do another issue: fix some bugs. While testing I was not able to reproduce any bugs. Filmed a video of app, attached all proofs to the jira issue and informed the teamlead. He couldnt believe his eyes! One month ago he saw the bug and now its gone! I had to retest 3-4 times everything and he still doesnt take my word for it.

I cant continue working like this. I have few years of experience under my belt, never had to deal with such insecure teamlead. How can I work if he second guesses everything what I do? Jesus.