Activity screen stops showing during walk

For the last few weeks (not sure whether it's since 19.05) my 2s will randomly stop showing the activity screen mid-walk.  It looks as though there is no 'activity' taking place at all, however it is still recording, which is confirmed by the laps screen still showing up to confirm at the chosen intervals.  All of the buttons / touch screen work without issue, and at the end of the walk if I start a new activity it will the record the entirety of the previous walk.  

I've done a complete reset of the watch, however that hasn't worked.  It's also strange that whenever I do a software update on the watch, it 'downloads' an update every time (I've just done it five times in a row).  None of the software versions are altered after the 'update'. 

Anyone else having a similar issue?