I'm having the same problems. After surfacing the depth sensor still gives a depth indication. And yes, I did fill up the hole with silicone. I only have the problem when I dive in salty or murky water. It is not the depth sensor, since I replaced it with a new one Kevin sent. I'm suspecting a small misallignment of the hole in the metal bezel and the hole underneath in the plastic hole. This could create a smaller overlapping area, where salt or other particles get too easily trapped. I'm going to make the hole in the SS bezel bigger. This should fix it, if this caused the problem.

I tried to contact Kevin via e-mail and phone several times to get their input on this issue but apparently he is too busy again .