Part of this (the "It is left marked as unmounted and nothing shows in the listing display. But the device is actually mounted..." part) is still an issue, and reported separately at:
https://bugs.launchpad.net/ubuntu/+source/dolphin/+bug/1806154
Part of this (the "It is left marked as unmounted and nothing shows in the listing display. But the device is actually mounted..." part) is still an issue, and reported separately at:
https:/ /bugs.launchpad .net/ubuntu/ +source/ dolphin/ +bug/1806154