I can literally named hundreds of priests who were in a conscious state of mortal sin yet continued to say Mass.
The most recent hypocrite is Father Michael Manning was just recently outed publicly for having a decades long sexual affair with his cousin, ewww. Yet, he still had the gall to have a TV ministry and counseled people on marriage.
Then please do so with documentation.
You are confusing Donatism with receiving communion in a state of mortal sin. The sacraments are not invalidated because the priest is a sinner.