In attached test debuggee VM generate 500 MonitorWait and MonitorWaited events in follows way: one thread call Object.wait() and another thread interrupt this thread when it's state changes to TIMED_WAITING.
Debugger create MonitorWaitRequests and MonitorWaitedRequest and counting received events, number of received MonitorWaitedEvents is always less than 500.

Test output:

Total events:
Wait events: 500
Waited events: 408

Error: waited events < 500 actually: 408
TEST FAIL