I logged in as ben (admin) and added external storage to his dropbox account. I logged in to Bens Dropbox and created a key. This all worked fine. Can see dropbox in Bens nextcloud.
I then shared this folder with Andy (admin) and then logged in as andy and can successfully see folder. So everything seems to be working properly.
I then changed the password to Bens account and logged in as Ben. However, no longer see the dropbox external storage. However, when logging in to Andy’s account I can still see the Dropbox shared folder and contents.
Nextcloud version _12.0.2
Operating system and version Ubuntu 16.04
PHP version _ 7
Is this the first time you’ve seen this error?: Yes
Can you reliably replicate it? (If so, please outline steps): Not tried