It is possible to consecrate a bishop or even a succession of bishops who drift into heresy overtime. At that point firther consecrations cease to be valid.
= = = =
So, does that mean, that after the orgies or some such earlier . . . the consecrations were not valid any longer, in the RC edifice?
Sounds like similar to what I was contending about Holy Spirit lifting His anointing . . .
No. To say so would be the heresy of Donatism, condemned into oblivion by St. Augustine. The validity of a sacrament is not impacted by the disposition of the priest.