I know that in the log-file there always was a message reading "Waiting 900 seconds before joining a guild fight". After the fortress update the Bot sometimes forgets to check and/or to join a guild fight (both attack, and defense). It was a few days ago, so I don't know exactly what happened but I waited for 3 hours after it was possible to join a fight and the Bot did nothing. Then I clicked it manually and went to bed
I didn't look at the log file, unfortunately. Now I see another guy, that is definitely using the Bot, in my guild having the same problem, so I write about it here. If this happens again, I'll let you know if the message "Waiting 900..." was in the log or not.