Here's a .cube file I printed.
I figure you are going to decode this with CodeX? I did that just now (first time I've done this) and nothing is standing out to me that would make it pause at the end of the first layer for 4 seconds.
Also, does the 2nd gen Cube really heat the extruder nozzle at 250 C for PLA? That seems WAY hotter than I would have expected...