Thanks a lot for all your hints and testing the issue!
Android 10 devices:
My issue seems that my 2 android 10 / CC-by-WiFi devices are "seen" by RL as the same device although they have different names set in CC.
After updating RL to the yesterday's v.10.10.2020 i deleted my devices, but was able to add only 1 of them, because my 2 devices show now as connected under the name of the first added device as follows:
- i connect device with the name X in CC, add it in RL and it shows as connected under "status"
- i disconnect device X
- i connect device with the name Y in CC, but i cannot add it in RL because it show as already connected in RL under the name X
USB devices:
I also have a third USB-device, a "Sony Reader", this one connected by USB cable shows in RL as a different connected device with the correct name: "Sony Reader".