AT Cellular API issue in AT Handler

The AT handler does not handle a response in the format
CRLF response CRLF

You can use the set_delimiter() function to specify a character(s) to denote a new line.

That doesn’t work. It is already set to CRLF. The response handling code can’t handle things that begin with CRLF

And prefixing the response string that you look for with a CRLF doesn’t work?