Question [Q] 720p playback stutter in MX Player

my device is Galaxy Nexus Maguro. Been using Cyanogen nightlies for ages, 720p mkv's have been working without any issues. (SW / HW+ custom codec armv7 NEON modes)

On Omnirom, playback stutters (which ever nightly version of the rom since it's been available to maguro device)

Can anyone confirm (on this device / any other) / help me out please ?

I suppose it has something to do with HW accel....

thx in advance

Device: Samsung/Google Galaxy Nexus GSM (Maguro)
Rom / Kernel / Radio / Bootloader : Omnirom Nightly / Omnirom Nightly / i9250xxlj1 / primemd04