Played alone on the server and opened my Combatsuit than the desync happened and it redownloaded. My friend had it some hours earlier quite often, for me was it the first desync ever.
desync report > https://drive.google.com/open?id=0B7xOt ... kpCdGtCNlE
[0.15.3] Desync report
Re: [0.15.3] Desync report
Thanks for the report. This should be fixed in 0.15.10.
If you want to get ahold of me I'm almost always on Discord.