Be aware of a custom link as title in a custom block

UNA 14RC3 cloud hosted by UNA

I created a custom RSS block. Testing a custom URL as block title works fine. BUT that makes it impossible to edit the block again (neighter studio/page nor studio/dev/page). The target is the defined link and not the edit "" block.

Fortunately you can still move this block to the Inactive Blocks Section.

Is there a trick to get rid of this block once and for all?