Is there a chance that you've set up sleep timer in the settings?
Sleep timer was and still is off.
Anyhow downloading the official Oreo at the moment and will see how that goes.
sorry, but what is the android tool and where can we find it?
After downloading and extracting, it's in the DX200FW-8.1-V1.01.006/Tool/DX200_update_tool_windows/DX200_update_tool_windows/2.AndroidTool_Release_v2.47-English
As implied, under WIndows only. No native MacOS tool. But should work under VMWare Fusion/Parallels, etc.
I hope they post release notes again - I haven't seen much of anything that needed fixing from the Beta v2 + Lurker's add-on
Can't remember which ones Beta v2+Lurker's add-on has and hasn't :-
Improvements with this firmware:
1. Added Bluetooth DAC+AMP function to system settings. (Android OS)
2. Auto mute On/Off setting is added to system settings/audio settings. (Android OS)
3. Added the setting guide for setting the language, time zoom, time, WiFi on the first startup.(Android OS)
4. Added options into Settings/Reset, now erase all data can be selected.(Android OS)
5. Improved the LDAC and aptX support of the Mango Player APP. (Android OS)
6. Improved the playlist import and export, to have a better support for different languages and codes.(Android OS & Mango OS)
7. Improved the cue support. now supports UNIX.(Android OS & Mango OS)
8. Improved the sorting by added time feature.(Android OS & Mango OS)
9. Rectified the bug that sometimes the bottom system buttons malfunction.(Android OS)
10. Rectified the bug that some ALAC can't be played. (Android OS)
11. Rectified the bug that some ISO file can't be played. (Android OS)
12. Rectified the bug that when using "file transfer" with computer, the files on the SD card can't be correctly displayed.(Android OS)
13. Rectified the bug that when the Mango player is paused, and a third party audio player APP is used, the side button would not respond to the player APP.(Android OS)
14. Rectified the bug that when using the Apple Music player APP, the sound stutters.(Android OS)
15. Rectified the bug that only the currently playing song's music info can be displayed correctly. When viewing other song's music info, the currently playing music's music info would be displayed instead of other song's (Mango OS)