com/sun/java/swing/plaf/windows/Test8173145.java fails on mach5

If enabled ie if removed from ProblemList.txt, the above test fails with

java.lang.RuntimeException: Wrong focus owner
jib > at Test8173145.test(Test8173145.java:80)
jib > at Test8173145.main(Test8173145.java:56)
jib > at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
jib > at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
jib > at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
jib > at java.base/java.lang.reflect.Method.invoke(Method.java:566)
jib > at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
jib > at java.base/java.lang.Thread.run(Thread.java:835)