WTH is going on?

[btwistround]

Obviously I'll be heading to a watchmaker to look at this issue. Likely independent for speed and ease unless it's a tricky issue, then back to my AD.

My Black Bay GMT (purchased January 2019), for the past week or so has been running erractically. It's pretty much my daily wearer, apart from weekend G-Shocking.

Even done a full wind daily and multiple times a day, around 60-70 winds.

But it doesn't hold power and after a few hours it just dies and needs winding to start up again.

Have checked with the Lepsi app for magnetism, but nothing is showing up. I'm no pro though.

Anyone any ideas?