Scala.js backend cannot emit static fields

Compiler version

3.1.1

Minimized code

import scala.annotation.static

object Invoker:
  @static val x = ""
  @static def f(): Unit = println(x)

Output

 java.lang.IllegalArgumentException: requirement failed: a member can have a static constructor name iff it is in the static constructor namespace
Error:  	at scala.Predef$.require(Predef.scala:337)
Error:  	at org.scalajs.ir.Trees$MethodDef.<init>(Trees.scala:1148)
Error:  	at org.scalajs.ir.Trees$MethodDef$.apply(Trees.scala:1134)
Error:  	at dotty.tools.backend.sjs.JSCodeGen.genMethodDef(JSCodeGen.scala:1563)
Error:  	at dotty.tools.backend.sjs.JSCodeGen.genMethodWithCurrentLocalNameScope$$anonfun$1(JSCodeGen.scala:1529)
Error:  	at dotty.tools.backend.sjs.JSCodeGen.withPerMethodBodyState$$anonfun$1(JSCodeGen.scala:106)
Error:  	at dotty.tools.backend.sjs.ScopedVar$.withScopedVars(ScopedVar.scala:33)
Error:  	at dotty.tools.backend.sjs.JSCodeGen.withPerMethodBodyState(JSCodeGen.scala:107)
Error:  	at dotty.tools.backend.sjs.JSCodeGen.genMethodWithCurrentLocalNameScope(JSCodeGen.scala:1535)
...

Expectation

It should work with val just like it does with defs. The following compiles fine:

object Invoker:
  @static def x = "" // methods work fine
  @static def f(): Unit = println(x)