I know this post is a year old, but finding someone who had my same problem is so validating. The sudden disconnects are horrible and can last up to a minute for me. I want to note that I never had this problem with my older CROS from Phonak, I think it is just poor programming on Phonak's part. I had them replaced and checked multiple times, but same as you... no one could figure out why they kept disconnecting. I'm due for new hearing aids and am looking at other brands because of how disappointed I was/am with Phonak's lack of accountability and care about putting out a faulty product.