I keep getting refresh timers on nodes I haven't completed.

I've had this happen a few times too on my phone, force closing the app and restarting it seemed to correct the problem for me. I don't know if you're having this problem on a phone (or tablet maybe) or on PC, and it's been a few days since you reported this so you might already have tried this by now. Anyway, hope this helps you if still needed.

Do you mean that all timers are set to about 20 minutes? Or that the nodes in the main have been reset, and you have to replay them to reopen the nodes? Because that's what I just had happen, could be a result of the update that went live a couple of hours ago maybe. Funny thing is that after playing 2 nodes some others became visible that were not replayable, i.e. they still had the red check mark. Oh well, it netted me a 200 iso prize and 2 standard tokens so it's not all bad, and sorry for the slightly off-topic subject.