Built-In Function Prefix

Built-In Function Prefix

Good day,

I am facing the strange behavior of Zoho. I do have two almost similar scripts that run on different forms, but on the same subforms. At first both script were working fine, but later it just stopped and was giving errors. I opened the script and see that strange prefix(APPNAME) for built-in functions such as isBlank and isNull. I guess it started treating them as custom functions, but still couldn't find the bug. And every time I rewrite and save the script, functions get prefixes.