On that note in IntelliJ I seem to be struggling finding usages of methods and fields since 1.14. Even when I search in all places it only shows me the results in my files. Could be the same issue. I'm using a outdated version of IntelliJ though (still 2017.3)
I think this is a bug from the Gradle Editor !
I mean , in 1.12 , I don't encounter this type of problems because was no need for an internal plugin like gradle editor
Then , 1.13 come out , and starts to get wanki!