meta.package not updating

Using 2017b.

I have some code which performs inspection on a package periodically, however, if a function is removed from this package the corresponding meta package class will not reflect this in its function list. This then causes an error downstream when I attempt to call these functions.

Calling the meta constructor and gathering the function list through:

package = meta.package.fromName(pkgName);
fns = {package.FunctionList.Name};

Adding a function to the package is reflected correctly in the meta object but removing one is not. Any assistance/explanation as to why this is the case is appreciated. Thank you.