Can't send a message with this word although it's harmless

When I played Bakery Story today and tried to send a message onto someone's wall containing the word "vague," I get a pop-up message saying that my message contained an inappropriate word so it won't send. I tried to post the word "vague" onto my own wall, but I got the same message. Does "vague" mean something else in another language that's supposedly inappropriate?

By the way, the known definition in the English dictionary for "vague" is:

vague
vāɡ/
adjective
- of uncertain, indefinite, or unclear character or meaning.
"many patients suffer vague symptoms"
synonyms: indistinct, indefinite, indeterminate, unclear, ill-defined; More
antonyms: clear, precise, firm
- thinking or communicating in an unfocused or imprecise way.
"he had been very vague about his activities"
synonyms: imprecise, rough, approximate, inexact, incomplete, nonspecific, generalized, ambiguous, equivocal, hazy, woolly
"a vague description"

Someone care to enlighten me?

:x

We're unable to discuss our language filter due to security reasons. It's possible that a combination of letters in the phrase you're using is being detected by the filter. We will share this with the team. In the meantime, please consider an alternative phrase while we look into this. Thanks!