I have a strange issue, I have two apps using the same SPlist and all works fine but I have now duplicated a functionality from one app to the other, and it's basically patch function which sets some fields to Blank(), in the first app the code works as intended, in the second one it doesn't. I think I've checked everything that comes to my head, I even tried different value and the code works so it's Blank() specifically that fails.
Any suggestions will be greatly appreciated.