Yes please do be aware that the new If node has changed how the logic is calculated so in older graphs you’ll need to be aware of this 
Please read more about it on our blog post: Dynamo Core 2.12 Release - Part 1/2 - Dynamo BIM
You should still be able to return the same results as before (Check out [Request for Feedback] If Node - #24 by solamour for pointers), but now we also support a bunch of new use cases.