Hi Quixzal,
I see the same thing happening all the time.
Almost always It’s when I try to launch one of my older maps, or when I’m playing obscure maps found through search keywords.
My theory is that there are ‘backwater servers’ that store your island when it is not actively played.
I’m usually in a situation where I’m trying to show someone an old map I made, and it’s a bit awkward to say “uhh… just sit tight this is normal… it will launch eventually…”
Thanks for making a bug report about this.