Tidal updates - check streaming settings

Twice in the last 6 months, after Tidal updates to their app, the streaming setting reverted to a lower resolution playback. I had to manually change it back. With the most recent update, the HiFi display on the main page remained highlighted even though it wasn’t playing back at the HiFi rate. A false positive. Be sure to check the steaming menu every so often.
Should it be at high or master?

Thanks for the tip.  Mine had been changed from Master to High.  Shame on me, I didn't even notice!
@jmolsberg It depends.

If you have the $20/month subscription:
- set it at HiFi for CD sound quality - and if your streamer and/or DAC cannot unfold MQA.
-set it at Master, if your streamer and/or DAC can unfold MQA.

If you have the $10/month subscription,
- Normal is the only option.

Tidal has a new setting called ’High’ - between Normal and HiFi. It states: "Best compromise between data usage and sound quality." This setting is probably for a mobile device with a limited data plan. I have no idea what the bitrate is.
You are more correct than you know!

Tidal also changed to "Loudness Normalization" Check that too.

Many thanks
It just happened again.  Be sure to check every so often.
I'm using a browser to stream and it just prompted an update.  The Release Notes reference something to do with Audio Quality Selection... 

Release July 10, 2019 (v3.13.1)
 * Switch video playback engine
 * Remove Flash in Edge
 * Fix audio quality selection and display
 * Fix autoplay issues
 * Various bug fixes