eDP switch issue when one LattePanda reboots

Hello everyone, 
I am using two LattePanda MU sharing one eDP display through an eDP switch. Everything works perfectly when both PCs are running.
However, I have encountered the following problem:
The switch is connected to LattePanda #2.
I reboot LattePanda #1.
After #1 finishes rebooting, I switch from #2 to #1, but #1 no longer detects the display.
When I switch back to #2, #2 continues to work normally.
The same problem occurs in the opposite direction.
Has anyone used a similar two-PC / one-display eDP switch setup and experienced this issue?
If this happens, is there any way to re-link or re-initialize the eDP connection on the affected LattePanda without rebooting it?
Thanks!