ANR issue with Social_security_Numbers(?)

My app has some ANRs.
One of them is; “Native method - jdk.internal.misc.Unsafe.park”
if I look into stack trace, I see this line;
at Kj.run (chromium-TrichromeWebViewGoogle.aab-stable-<US_SOCIAL_SECURITY_NUMBER>:8)

What is this? In the app there is nothing with US_SOCIAL_SECURITY_NUMBER.

here is the full trace;
at jdk.internal.misc.Unsafe.park (Native method)
at java.util.concurrent.locks.LockSupport.parkNanos (LockSupport.java:234)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos (AbstractQueuedSynchronizer.java:2123)
at java.util.concurrent.ArrayBlockingQueue.poll (ArrayBlockingQueue.java:432)
at java.util.concurrent.ThreadPoolExecutor.getTask (ThreadPoolExecutor.java:1062)
at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1123)
at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:637)
at Kj.run (chromium-TrichromeWebViewGoogle.aab-stable-<US_SOCIAL_SECURITY_NUMBER>:8)
at java.lang.Thread.run (Thread.java:1012)