Fenix 5s+ takes over 10 minutes to boot?

Hi, I bought a Fenix 5s+ a few weeks a go and because of the battery that runs out so fast (issue 1, let's keep it for a different topic) I need to boot (turn on) it several times a week. It take over 10 minutes to boot my watch. It seems to hang on "Loading FIT files..." for ages. Is it just me / my watch or is everyone experiencing the same.

It happens on both 5.10 as 5.53 beta firmware. I have downloaded quite a few Spotify songs, not sure if that matters?