Learn more tab is open inside Zulip app

What went wrong?

When user open Learn more frim i button while inviting a new user, the Learn more tab is open on a new tab on web browsers (in my case Chrome). But when I open Learn more from Starred messages the Learn more is open inside Zulip and it is a bit confusing to know how to close it because there are not x buttons, the only button is Back button on bottom left.
Improvement: To improve this UX broken flow it would be better that all Learn more buttons are open as a new tab on Browsers (eg. Chrome or Safari)

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