I have noticed something like that. It's important on a saxophone site because there are certain models of mouthpiece that might be denoted with asterisks,
e.g. there is a 4 star which is written: 4**** . If I just type that it is fine
But if I type ****ing 4****
it ends up as ing 4
But if I type ****ing 4**** ( with the actual f word) it shows the 4 asterisks for the naughty word, and only two asterisks after the 4, instead of four as it does in my first example here.