Parsing file fails sometimes if function being parsed starts on first line of the file.

[kwalkerAvst]

I have found an issue when parsing a script file where if the function I want to extract the value starts on the first line, sometimes the parsing fails to extract the value.

As a workaround, if I add a new line to the file with a blank comment on it before parsing then it always parses as expected.

Does anyone know what may cause this, and has this issue been seen before?

My colleague raised a similar issue before at #1468 but we never heard of any reason this may occur.