This is still a connection difficulty. If you have a different USB cable to try, I’d recommend trying that. And, if you are using any kind of USB hub or adapter, I’d recommend trying a direct connection instead.
You might also try disconnecting the power supply, disconnecting the USB cable, and then try connecting only with the USB cable until the connection is working reliably. You might also check if wiggling the USB cable (with power disconnected) causes the “3.3 V” power light on the power light on the EBB to turn on and off. If so, that suggests that the cable or board needs to be replaced.
For the difference between a rectangle versus a square, that is likely map projection, because you are wrapping a flat image around a sphere or egg shape: https://wiki.evilmadscientist.com/Eggbot_Quality_Troubleshooting#Map_Projection
