Supports Detach Causing Print to Shift

[bjennings 0]

This has happened several times now and can't seem to fix it. My supports will not adhere when printed on top of the model. look at the top right of the picture. There's a slot in that piece and the support block that's supposed to fill it detached. It looks like it caused the print head to jam and offset the rest of the print. What am I doing wrong?

I'm using an Ultimaker 3e with UM Black ABS. I have Cura 2.4 and I printed using the default settings except I added a support interface layer. I solved the issues I was having with prints not adhering well to the build plate by enclosing the entire printer to keep out any air currents and stabilize the chamber temperature.