Not sure if it's a bug, but having never seen this before....
I've just installed 'Enscape-Setup-2.2.3.4-g070c5ba' and, when running a batch render export, got an OpenGL
TBF I am only running a K2200 and the model's been developed a fair amount since the last time I ran the batch, I'll be getting my IT to investigate the timeout value, but thought I'd flag it here.