Yet Another MQA Unfolding Question

I almost hate to ask as this stuff is asked so often. 

I'm running Tidal to Bluesound Node 2i to a DAC.  When I change in my NAD M51 DAC, which I understand not to be able to render the final fold in MQA, the NAD M51 reads 96khz on its display with MQA files. 

I thought that the NAD M51 would only read 48khz if it cannot do the final unfold of MQA?  

What can the experts tell me here?  I thank you kindly in advance!