Random Question Marks (?) Appearing in Posts

[KevinG1232019]

I'm running Xenforo v2.2.2.

Recently, random ? characters are showing in posts.

Here's a link to one thread.
https://pipesmagazine.com/forums/threads/hilarious-pipe-description.88858/

Scroll to post 7 and 11 (user ChasingEmbers)
Post 13 (user Simmerdown)
Post 14 (user Mtngeo)

Appreciate any help.

I do not have anything set up in the Censor area to change anything to a question mark.

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