This is the way the link is setup. It’s configured to open in a new tab by default. There isn’t really a way to do this at this time. Is there a particular reason you have a need for this feature?
Yeah there’s no way to change the default behavior of this in the browser that I’m aware of. Thats again because it’s the way the link is setup. However, you can open these links as a new tab by using Ctrl + Click on the thumbnail, which will open any link clicked on this way as a new tab. Alternatively, you can right-click and select Open link in new tab from the context menu.