this keeps coming up in support questions for libraries. Anytime an interface/class implements a method, and then extension functions extend it using methods of same name but with friendlier signatures, … Once you have the member in use, the IDE almost never will suggest the extension import leaving people with compiler errors. If you are typing and the first auto complete comes up you tend to have hope if you select the right one first, but if you cut-n-paste you get the class imported and then its all over, no more help. You have to manually go change the import.
https://youtrack.jetbrains.com/issue/KT-9238 is related, but are there other issues I can go upvote?