MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
its a problem that is caused by the huge overhangs on top..
I thinks its really the limit a 3D-printer can do..
To solve the problem, please increase the flowrate in your settings -> flowrate :180% of your "normal" print setting.
For creality ender 3, I uploaded a gcode just a few moments ago.
Hope that will solve your problem :)