Hello Alex,
Is this happening with some shipped specification or with the custom one? If this is a custom one, please check that there are no negative values in any fields (COMP_LEN, THD_ENG_M, THD_ENG_R, etc...). Just in case make sure this is not project specific, if no then it could be that some custom ebs files could influence component connection.
I hope this will help.
Regards,
Artiom