I have the same problem and found here the fix.
But I have a specific question regarding this argument:
I have a form that submits on BUTTON XXXXX IS PRESSED.
Then, two emails should be sent:
1 - with attachment to my email account;
2 - without attachment to the customer that filled the form.
I removed the "go to page" destination on the first created universal email Server Behaviour.
Will the trigger (button XXXXXX pressed) be executed for all two universal email SB?