If you are running OH from an SD card, try a fresh one.
quote=“PeteC, post:21, topic:109307”]
I can’t find anyone else that is experiencing this problem
[/quote]
Wow… just search for “rules stop working” and you’ll find a bunch of similar issues 
. This is usually caused by the same thing and it is discussed many times in the forum. The old rule engine allows rules instances of rules to execute asynchronously, and they are limited to a threadpool of 5 threads. Without seeing your rules, there is no way to help you find where this limitation could be causing your rules to stop. If you want to figure it out on your own, look for Thread::sleep, executeComandLine, never ending lops, http actions, any long running rules, rules that just never end, etc. Here is one of the main topics…
Find where the threads are being eaten up, increase the threadpool, or use the new rule engine with scripted automation. If you are thinking of rewriting your rules anyhow, this is a great time to make the move away from the rules DSL. I highly recommend Jython and the helper libraries. I have some add-ons in the Eclipse IoT Marketplace, so you can install through the UI.
I think it is time to change the tile of this topic, which has gone down a very long and winding rabbit hole!