KB4532695 (Cumulative Update for Windows 10 Version 1909, released January 28, 2020) resolves this issue.
https://support.microsoft.com/en-us/help/4532695/windows-10-update-kb4532695
It would appear as though this update resolves the issue.
I will however continue over the next few days to determine if this is the case.
I will however report that while I can paste search parameters into the Explorer Search Bar using CTRL+V or SHIFT+INS, I cannot do so using a mouse right-click. All I get is the system menu with Restore, Move, Size, Minimize, Maximize & Close:
I would expect that a standard text popup menu containing Undo, Cut, Copy, Paste, Delete, Select All would appear...