Error in compile pl/sql package use in case construct: fetch first 1 rows only

Hello.

I found bug like this:
https://database-navigator.atlassian.net/browse/DBN-305

Information about the plugin:
Version 3.0
Build 5933

In package code dissapears after compile:

Code of my function:

Code dissapears after line:
order by inc.priority;

I think the error is due to clause in "case":
fetch first 1 rows only.

This clause is oracle 12с.

Fix this bug, please.