I am having a similar issue. I can right click on Editor > Desktop Panels > Navigator and the navigator will show in my pkb package. But if the next file I open and work on is a .sql then the navigator goes away - which is correct. However when I get into a package again the navigator used to still show up but now it goes away. Basically each time I work on a .sql file it hides the navigator which is my preference but it hides it FOR EVERYTHING instead of just the .sql files. The packages should ALWAYS have the navigator and they used to. This is recent to the 12.10.0.30 version. It's frustrating me.
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