HyperPixel 4.0 goes blank/black

Hello, I have:

HyperPixel 4.0 - Hi-Res Display for Raspberry Pi – Non-Touch

I have it attached via a male to female GPIO ribbon cable:

It worked perfectly, seen as a “second monitor”

But recently when I move it a little, it goes black/blank. I am very careful with it.

When I reboot, it comes back no problem.

Any idea on a fix? Or at least a command or setting I can do/change to get it back without rebooting?

I’d prefer to not have this happen, as this thing will be installed in the field.