I haven't been able to determine why is happening, but Tapatalk is causing memory issues with the server. Lately, the server has had multiple incidents where TT was making MANY hits on the server all in one instant, driving the memory to capacity and forcing the server to terminate the processes. The server support folks went through the logs to see what was running every time this happened and it was always a TT process. It is not shutting the site down or anything, but it is likely there is some kind of glitch in the TT code and how it interfaces with the forum software. I'll be keeping an eye on it for now, but if it does start getting worse, I may have to uninstall TT. I was warned about this by other admins when I mentioned I had it installed, but thought I'd give it a try and see.
There is a new major release of the XF software coming out in the not too distant future. If TT doesn't step up its game, it may not work with the new release. So even though I don't mind having it installed, that may be taken out of my hands at some point
It's like they have a good idea, but they just can't quite carry it off. I know that if someone else came out with something like TT that was more reliable, many of the forum admins would jump on that in a heartbeat.