If someone puts a URL in a text block, I can click the URL to go to that webpage. Neat!
If one user is editing a text block, that text block gets locked off so no one else can edit it. Neat!
But it turns out that when a text block is locked off because of editing, none of the URLs work. Uh oh.
For example:

Miro must know the link is a link, because it underlines it. But because “Andi” is editing it in another tab, I cannot interact with the text.
Suggestion: Even though you can’t edit, you should be able to click on a link inside the locked-off box to get the normal popup to go to the linked site.