Meridian Explorer² + OTG USB cable do not work on Android

I’m using my Meridian Explorer² with a Windows 10 laptop while on the go, but also with an Android smartphone and tablet.

That worked OK with a Galaxy S7 edge (SM-G935F - Android 8.0.0) and a Galaxy Note 10.1 2014 edition (SM-P600 - Android 5.1.1). My wife is now using the S7 edge and the display of the Note 10.1 died after it was dropped on the floor.

But with a Galaxy Note 8 (SM-N950F - Android 8.0.0) and a Galaxy Tab A6 (SM-T580 - Android 7.0) the power led remains dead.

Does anyone have the Meridian Explorer² + OTG USB cable working with those devices?