Running epic/master; when using the BP all actions component menu, it would randomly crash during autocomplete if ESC key is pressed to close it. This happens whether a pin is dragged or not to connect to a new node.
Also, on some Blueprints the Del key does not work to delete nodes, although this issue seems to be intermittent.
Thank you for the report. Any version of the latest master branch is always being tested and most bugs are caught by our QA team on their editor passes. I believe both of these issue were caught and fixed in the latest update (6/1/15 CL-2572205).