Answer containing string `echo ` followed by a letter is blocked/hitting an abuse filter

I'm hitting a filter when trying to use the word echo followed by -e in my answer.

The block filter looks roughly like this:

echo [^ ]

My affected answer: https://stackoverflow.com/revisions/79989651/4
(For the time being, I've circumvented the filter using echO instead of echo)

Images:

• Error message: https://i.sstatic.net/QigzIEnZ.png
• 403 in Devtools: https://i.sstatic.net/2fi9JJaM.png
• Response HTML: https://i.sstatic.net/nSgIngiP.png

Update: Based on the related threads, other commands affected by the filter include: DROP and df.