FaceTime not working for just one person but can work well with others

My husband and I FaceTime all the time, sometimes it works but often more time then one it will pop up saying “Choose another phone number or email address to call “ BL0D1e”, that the email in the contact card is not available for FaceTime”.

when I know it is, and he does to, because sometimes it will work. On days it don’t is STRESSING ME OUT! because he thinks I’m blocking home from FaceTiming me, when I’m not but I have no way to prove any of this. I have cleared all my older FaceTimes off, that’s when I noticed it worked a few days, I’ve tried to turn off FaceTime and back on again, I’ve signed out of Apple ID,and sign back in. No change! My software is up to date. And I have only had this phone for about 6/7 months.

seriously Apple get it together! I’m on the verge of a divorce or nervous breakdown!! Which ever happens first!! Please help me !!!!!