Materials Editor Nodes Disappear Bug

Hey, so I just am using UE4 for the first time, and am seeming to be experiencing this awful bug on the mac os version. When I am editing a material in the material editor, and I create a new node, a vector, a power, whatever, all nodes disappear and I only see the links and dots/squares/nothing where the nodes use to be. Even the parent node disappears. The only way I found to get the nodes back is to close the material editor window and reopen it. Any help is appreciated.

Specs:
UE 4.17
Mac os 10.13.6
2.3 GHz i5
8 GB 2133 MHz Ram
Intel Iris Plus Graphics 640