If you have different domain and subdomain configured in Manage Domain page with different patch and you delete one or more of this ... I don't know why but the page is not well refreshed or cache cleaned.. I don't know and happen you press X symbol of delete of DOMAIN A and you are deleting DOMAIN C
Happen also today and after is very difficult understand what has been removed for error.
I experienced this issue in Webuzo with different server and different old and also last version of Webuzo.
I don't now how to tell to reproduce just using your Webuzo panel and manage domain with many domain.
Maybe you need fix something or add more check like a domain string in the confirmation message example I press Delete button for DOMAIN A message will say: Are you sure to delete domain A ?
If in future pressing yes is deleted DOMAIN B this is very bad and again something is not working good.