Ah, I believe it is KitKat based.
Android version 4.4.4
Model number: Nexus 5
Build number: LegacyROM-XD Kitkat (ext 4)
I had someone else try the same iso rom and worked on his android device, even using the free version of Magic Dosbox.
And yes, it happens with both cores.
Is KitKat an issue?
Thanks for following up