Our guild has also been having multiple “bugs” in guild missions, which is very unfortunate since you spend a lot of time and influence building these things.
Guild Trek has bugged out on us about 1/3 of the time by not allowing us to “activate” just one of the locations so we end up with 14/15 at the end.
Guild Rush has been failing to complete when we have 15/15 as stated above. Happened to us last night actually.
If these weren’t required to open other missions type and take so long to build it wouldn’t be such an issue, but when you spend days building all of these missions, get the participation to actually complete them in time and successfully complete them, it is disheartening to have them fail. Anet needs to fix these types of issues quicker than they have in the past.