Hello! Long time listener, first time caller. Love what you all have done with LibreELEC. 
Not sure where to report this but wanted to say that git tag 8.90.003 builds and deploys for an upgrade on odroid_c2 with minimal issues. I know you didn't release an official build but I played with the Generic build and couldn't wait to see if I could get it on my other devices.
I have been playing with it for 20 minutes and found two issues.
1. I did an upgrade so maybe an issue you are aware of. The storage device did not have ext label of 'storage' so it couldn't be found on boot. Easy enough fix if you know how to do such things.
2. Passthough while enabled before upgrade and still enabled in configs did not work. Disabled and enabled fixed the problem.
If there is a better place i should of posted this let me know please. If this stays stable I will probably follow the releases on my home hardware and report issues. I only found this for a contributor guide ( Contribute – LibreELEC ) so i apologize if there is a doc out there I should of read first. 