Possible issue with guilds?

My buddies and I have a guild but we haven't been online for a while since we played everything we wanted in the last league.

With the new patch we're trickling back in and when I went to throw something to one of them in the guild stash, I found I wasn't in the guild anymore.

We didn't have officers set up and the leader hasn't been online since BEFORE I quit last season, so there's no way I was removed by him.

We're a bit concerned and he's going to update and get back on to invite me back, but since we spent money on guild microtransactions, we're worried about the guild being lost/disbanded by a glitch as well.