As you can see from the video below, doing any action will freeze UEFN for multiple seconds, rendering development a painful process. This happens for projects that exceed 30% in custom memory, with URC enabled (I am on the Europe region btw).
I just opened up the editor loaded my 7% project and experienced a 10 sec freeze where i couldnt see my cursor while messing around with the outliner, haven’t experienced that before.