Quick Documentation not working on Java libraries or Scala methods

I recently upgraded to:

IntelliJ IDEA 2019.3 (Community Edition)
Build #IC-193.5233.102, built on November 27, 2019
Runtime version: 11.0.4+10-b520.11 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.13.6
GC: G1 Young Generation, G1 Old Generation
Memory: 2048M
Cores: 8
Registry: debugger.mayBringFrameToFrontOnBreakpoint=false
Non-Bundled Plugins: PythonCore, R4Intellij, YAML/Ansible support, de.netnexus.camelcaseplugin, io.protostuff.protostuff-jetbrains-plugin, org.intellij.scala, org.jetbrains.plugins.hocon

The behavior of Quick Documentation (F1) has changed, in two ways:

1. Selecting something and hitting F1 pops up a documentation window that shows "val _: Nothing". This happens with Scala library class/objects, my own Scala class/objects, JDK libraries, and external libraries. For example, hitting F1 while the cursor is on a call to java.net.URL#openConnection(). Or if I have a case class called SearchRequest, hitting F1 on appearances of that inside methods. This used to pop up the Scaladoc or Javadoc.
2. Selecting a Scala method call and hitting F1 pops up a documentation window that shows the Scaladoc of the enclosing method, not the method I've selected. For instance, if I have "def foo() = {}; def bar() = {foo()}", selecting the call to foo() and hitting F1 pops up the documentation for bar(). This used to pop up the documentation for foo().

Screenshots available on request.

Are either of these known issues?