Issue with welding tabs

[parsec (FerAS)]

This is a known behavior

Tabs do not want to weld

I need help please. I have constant problems with always 1 or 2 tabs not welding. 3 upgrades ago I just copied the design into a new window, and it welded without any problems. It was the quickest way to fix the problem. Unfortunately, with all the new upgrades that do not work anymore. I flipped the tab both vertically & horizontally, copied a new one, created a new one with no luck at all. The one tab (4th from top left) just does not want to weld, doesn’t matter what the heck I do. Sometimes…

And seems you found the solution by yourself.