iPhoto Shared Album Not Populating on iOS and Unable to Remove Subscriber

I recently created a Shared Album in iPhoto on MacOS but have realized two issues:

1. When I click the 'People' icon on the album and select 'Remove Subscriber' (on MacOS), nothing happens. I've troubleshooted the issue for two days, but no resolution.

It's as if the OS is ignoring that I am clicking the 'Remove Subscriber' button.

2. The Shared Album I created in iPhoto on MacOS is not populating on iPhoto in my iOS. When I open iPhoto on my iPhone, I am unable to see the Shared Album that I created on MacOS.

Has anyone else experienced this and figured out a solution?

I thought it was just slow to populate/reflect changes but after rebooting several times over two days I think it maybe another issue.

Thank you