I'm far from any sort of expert here, i can just say that the same thing happened to me in the beginning of August.
So i went back on Cortenema for 2 weeks, plus twice a day Canasa.
Just started to taper every other night this week, and so far so good.
But it was suggested to me here to use half cortenema, half rowasa until using all rowasa as part of a slow taper. I started that last night and hope to continue until all ROwasa!
Maybe you can start that? Just a suggestion as you are trying to avoid oral steroids?