For me, it happens pretty much every day. The older PhantomPilots software used to log me out mid-browsing, but I haven't seen it much on xenForo.
What issues were you getting on using (mem?)caching for session data? As long as the session identifiers are different between IP.com and PP.com, there shouldn't be any clobbering. But it's always a lot better than using file-based session storage.
What issues were you getting on using (mem?)caching for session data? As long as the session identifiers are different between IP.com and PP.com, there shouldn't be any clobbering. But it's always a lot better than using file-based session storage.