Thanks @Aravisian, I went to the link you provided and although the main posts didn't solve my issue, I followed the 'duplicate post' link and found the fine text leading to the alternative nemo option at the very bottom of the post-answerer's entry. Blows my mind that there are so many people out there with the same opinion about Nautilus developers going the M$ route with the usual corporate tendencies to ignore user input regarding potential issues or improvements that can be made to support quality control of the software they want their users to continue using.
As stated in my 'instant-search' post about another bothersome feature of Nautilus; I decided to drop it and swim with nemo which I've found is already 90% better for my use purposes.
Also managed to re-mount my Put.IO drive again after the nemo hiccup detailed in the linked post above - even nemo's interface/fluidity/performance/config & preference options and response are better than Nautlius when browsing these online drives...
On to the new post I promised, requesting Put.IO integration with 'Online Accounts' in Zorin 'Settings'.