Hi @Aris_Tsogas,
I have an iFi ZEN DAC v2 and facing MQA playback issues. Check this thread for details.
So, to face the issues I completely disabled the MQA support (dac & roon side). That did not help too.
I’ve contacted iFi support, they said it’s Roon issue.
Well, what I’m trying to say, the combo Roon + iFi is not a good one. Great products on their own, but not working good together.
p.s. Also checkout the firmware updates for your DAC. But have in mind, there is no downgrade.