What does the bug: When you leave or get kicked from a gang , the server sends you a message: If you had any houses in gang base, they were sold etc. As you deactivated the houses in gang bases to prevent going to base while capturing, you have to disable that message. For me, when I got that message for the first time, i was moving on all bases to find houses ......
When you discovered: Long time ago, but I didn't have any photos.
Location: Every time you leave or get kicked from a gang.
A photo with the bug:
http://imgur.com/a/C3PeW