The bubbles stay forever, it is useless to play now.
Not only a base at the top of a rocky spade is unraidable with a bubble but if in addition the bubble remain forever …
Why funcom don’t fix it???
Probably slipped through the patch process like the “no owner” bug.
Funcom knows it is a bug and has worked on a fix to come in a future patch - no time set on this yet, see this thread for an offical response on the issue: