Forbidden text combinations in code comments and discussions

Question

Why is it impossible for me to post a code comment if it contain (at least) a letter and the the Built-in function word c h r ( )? It seems to happen in Q&A Discussions too.
If you wonder why I put the characters in the built-in function word apart, it’s because otherwise it becomes impossible to post it😬.
(I’m using SoloLearns iPhone app.)

Answer 1

Per
edit: I discovered the same issue and have passed it along c hr()
https://www.sololearn.com/discuss/1316935/?ref=app

Answer 2

chr()

Answer 3

BroFar
I don’t know if it was a just a test you did, writing the function call word alone, but that was never the reson to the problem. As I told in my question, I’m talking about the case when the message “contain (at least) a letter and the the Built-in function word c h r ( )” (without spaces between the letters in the function word, of course); a text in combination with the function word. That still doesn’t work for me. Not in the code comments. Not in Q&A Discussions.