Sensor got deleted

Bit of funkyness going on with my F5 sapphire, running v8.0, would appreciate any advice..

On Sunday I re-added my Milestone footpod, renamed it and saved. Went for a run earlier today and the FP sensor was missing - I had to re-add it. Has anyone had something similar happen to them?

Also - might be related - but for the past 2 months or so, my F5 quite often displays "updating" on the screen (for around 3-4 seconds), usually when I save an activity, but also sometimes randomly when going through menus or when syncing. Again, anyone noticed this?

Thanks,