I have the same issue since yesterday, before that everything was fine and running smoothly. Happened first during gathering, short freezes, then nothing for a while, then a long freeze plus disconnect.
Then everything was fine again for hours, and next time it happened in the new extreme trials, much fun, had to stop those.
Same again today, quitting trials because i get freezes for 5-15s and with one disconnect again just 15min ago.
If this continues I might as well stop playing any group content since nobody can rely on me, it's no fun.