To be safe you might want to keep that plant separate from the others, by that I mean, if you take cuttings for example, make sure you use a new blade for each plant. If it is more than just an abnormality, for example if it is TMV, then it will be isolated to just that plant.
My old account was Jonus. I cannot remember the password or even which email account I was using for that account. Can someone DM me which emai I used for that account thanks.