A bit more info:
In tree [left hand side] under Drives And Devices / Explorer / Network / etc. that would normally show the server client [this one] and others connected [rarely my laptop, BUT mostly my server]
It is only showing this one here and not others [mainly server].
I use Synology as a server and if I map it it can be seen in the tree above the Network tab. BUT because it cannot be seen in the network tab the Filename shows it as a Mapped location not the correct one, although it does play.
It's difficult to explain this properly, but if I continue as a mapped connection then instead of the designated drive [ a named drive] it is an *S* drive [the mapped one].
I did notice it came back a few days ago but went again today.
any other ideas please.
PS this is MJR v 28 & I have tried all of the above as you suggested.