Since all I’ve ever had are Marcum flashers. I’ve notice that his seems to happen more with some of their transducers.
My first LX5, never had physical problems. This M1 I’ve just purchased last last year and actually used a few times this year…yeah the edges and bottoms are already showing wear and tear like it’s been used a lot. Which isn’t the case. Ducer were only in hole or on ice to prevent fish tangle and for hole hopping. Nothing out of the ordinary use.