Dragonfly 5 Pro Sonar depth reading over weeds

[pwelter]

My primary use of my Dragonfly 5 Pro is in freshwater lakes, and commonly in and around weeds. Most of the time the depth reading (the numerical depth on the display) is the depth of the tops of the weeds, and not depth of the lake bottom, or - if the weeds are spotty - fluctuates between the weed top depth and the depth of the bottom. Other depth finders I have used have little problem indicating the depth of the bottom, even with the weeds.

Why is this the case?

This is with all sensitivity settings on Auto. Happens on hard bottoms and soft bottoms.