Should I neutralise to British citizens now?

[Stawberrys]

Advice needed please.
I have my permanent resident and my husband is non eu. He just received his 5 years UK residents card as a direct family member of eea.

Can i neutralise to British citizens now without affecting his residence right. As I read from other post that British is not allow dual citizenship for immgation purpose , is that true that cannot sponsored my husband anymore? But he has his rc already.

SINCE the British is leaving eu. I wonder is become British is the safer way for me and my husband. Thanks for your help

[Casa]

I believe you mean naturalise. If you take British citizenship you can no longer be your husband's sponsor in the UK and he will lose his right of residence.
You should wait until he has PR.