[CA] Axiom 9 - Max Depth and 3D Sonar Issue

I have the Axiom 9 with the thru-hull RV-200 and I'm experiencing an issue where the depth and sonar cut out around 330'. I recently updated to 3.4 and testing over the weekend confirms it still cuts out. I have to head back into like 220' of water for the depth/sonar to start working again. Any thoughts on what maybe causing this and how to fix this problem?

Thanks in advance!