contains function is case sensitive despite documentation stating otherwise

contains function is case sensitive despite documentation stating otherwise

On this help page:
https://help.creator.zoho.com/Built-in-Functions.html

...the following is stated:
A function is a set of code, that takes a finite number of input and optionally returns a value. None of these functions are case-sensitive.
However, it turns out that the "contains" function is actually case sensitive.

This caused me to waste a lot of time debugging the wrong parts of my scripts over the past few days! 

Anton