Jira: Connect to Sentry doesn't register successful login

Sentry cloud, Jira cloud.

Installed the Sentry app in Jira. Under Manage Apps: Sentry: Configure, it shows

Please login to your Sentry account to access the Sentry Add-on configuration
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Sign In to Sentry

When I click Sign In To Sentry, a new tab opens and I see Sentry. But nothing changes on the Jira App screen. I tried logging out and logging in when requested from the Jira App; I also tried in Chrome Incognito (after enabling 3rd party cookies); same behavior.

Both Jira and Sentry.io are set up for Google auth, so might be running into something related to JIRA login with Google-managed users?.

Any help greatly appreciated.

We are also facing this same issue.