Interesting. I've sent two email messages to Hush outlining the issues I observed but have never received a reply from them.I experienced the "surfacing" issue last week. I had my Perdix as my primary, but was discouraged to have the Apple Watch not record a dive. I emailed Huish support and they responded very quickly and said it was a known issue and they were working on an update. Good to get a quick response and know they are working to fix the issue.