Emby for Android 3.5.28 will not play songs -- just skips over them all.

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Running Emby for Android 3.5.28 on a Tabwee T90 Android 16 tablet.  Emby server 4.9.30 running on my Raspberry Pi 5 NAS.  When it works, it works great.  But lately, can't get it to work at all.  It's always been iffy.

I choose a folder, click on shuffle.  No error message, but all the titles appear in the bottom bar.  They just flash by, it skips through all the songs in the directory, one-by-one without playing any and then just stops.  Very frustrating.  Tried restarting server, de-and-re Emby for Android, clear cache, start/stop app.  I've tried googling and perusing the forum for several weeks before opening a ticket, but can't seem to find others with the same problem.

I should mention, I also run Emby for Firestick on my four TVs and they work like a dream.  Also running Emby Windows 2.234.2.0 on several Windows computers.

It's just the Android on the Tablet that has never worked properly.

Any help would be appreciated.

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I should also mention, I'm running Emby for Android 3.5.28 on my Moto G50 without issue.  So it looks like it may be an issue just with the tablet.  I was heavily invested in JRiver for years.  Emby is sooo much better.  I really want this to work.  

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OK, I guess I answered my own question, and this may be of note for other people encountering this behaviour:

I play Emby wirelessly to a Bluetooth stereo amplifier.  This issue only happens on Bluetooth and with this particular stereo. 

After much experimentation, I determined that the BT chip in the stereo is an older one, and probably not compatible with my newer T90 tablet.

So if Emby has issues playing out to Bluetooth, it just skips over all the songs in a folder and stops.

Emby just rocks.  I'm very impressed.  I bought the Emby Premiere and uninstalled all my JRiver software.  No looking back!