Insomniac can't wake up phone from turned off display

[skiwlkr]

Insomniac is working great for me.
I always used a virtual instance on my server. I recently got hands on an old android phone (Samsung Galaxy S5 edge). I thought it could be cool to run insomniac there. So far all works great I only have one issue.

Insomniac can't wake up the screen of the phone. I turned off all screen locks, it stays black. When I manually unlock the phone, I see that my instagram profile is open. So in the background insomniac started the app but can't proceed.

I tried an app to keep the screen always on. Kinda stupid but it works.
Anyone an idea how I get insomniac to unlock the display?

Thanks!
Great bot keep up the good work!