I have installed Teams integration for Jira cloud and I've got the tab in teams correctly showing my list of issues for my project. I did not specify an existing filter when setting up the link - I just chose "Custom" and then selected my project from the list and did not do any further filtering.
However when I click 'Create Issue' I get the error "Cannot find project with key XYZ".
XYZ is not the key for the project I have linked when setting up the tab. It is the key of the first project in the "all projects" list in Jira Admin.