I had a working system involving a Chassis Logistic Pipe with Provider modules turned off by a Buildcraft Gate in version 0.8.2.89. My modpack upgraded to version 0.8.3.95, making the server crash every time someone tried to open a gate attached to a logistic pipe. I've upgraded to 0.8.3.100, which solved the chrashing. However, pipes don't get disabled by the 'disable pipe' function of the gates anymore.

Somehow, the pipes work now. Might have something to do with multiple server restarts, but I can't reproduce the issue. Closing it.