This is related to #1001125.

When importing an overloaded module's method, we should not display the completion proposal dialog. The method name should be simply injected without requiring user's interaction.

Here is an simple test case to reproduce the issue

object Foo {
  def doNothingWith(that: Any): Unit = {}
  def doNothingWith(that: String): Unit = {}
}

class Foo {
  import Foo.doNo // <-- ask completion here
}

I'm filing a ticket for this, instead of fixing it together with #1001125, because the current state of the code completion is such that implementing this correctly would make the code a bit more messy than it already is. I think we need to clean-up first (#1001912).