Hotkeys glitch, keyboard/mouse does not respond to keys being pressed, nor to mouse clicks...
Whilst defintely not my best play, I was holding my ground somehow, despite gg text barrage to "distract me".
Anyhow opponent launches a base tank rush and at that moment the hotkeys start not responding, neither to keyboard input nor to mouse clicks. I manage to fend it off somehow, and as rush is thwarted, hotkeys resume working.
I sincerely hope it's a glitch and not a hack/exploit...