Aurender Conductor App Experience

Ok please tell me I’m imagining this. 
Been listening most of the day to my new Aurender N20 vie the Conductor App and my new MSB DAC.  Sounds great. Smooth highs, nice midrange and impactful bass. Soundstage wonderful. Only area of concern is a slight hollow sound in the lower treble noticeable when listening to classical. Probably a burn in issue. Anyway late into the evening my 7 year old iPad runs out of battery power. So I quickly switch over to my new iPhone and connect with the Conductor App   Within a few seconds I notice everything sounds better. The hollow lower treble is gone. I start replaying my test tracks where I noticed this hollow sound. It’s gone. Am I imagining this. I wasn’t doing a test between iPad and iPhone so wasn’t expecting anything to change but it did. Could be that the grid got cleaner at that moment. Or one of the components reached burn in at that moment. I can’t believe nor understand how this is possible. Anyway so will be switching back and forth tomorrow to confirm this or that I have vivid imagination. A remote app or a different device should not have any impact on the sound. Right?