Java Nested Lock Deadlock

Consider the following DeadlockDemo class. If methodA() and methodB() are executed concurrently by separate threads, which potential concurrency issue is demonstrated?

public class DeadlockDemo {
    private final Object lock1 = new Object();
    private final Object lock2 = new Object();
    
    public void methodA() {
        synchronized(lock1) {
            try { Thread.sleep(50); } catch (InterruptedException e) {}
            synchronized(lock2) {
                // Critical section
            }
        }
    }
    
    public void methodB() {
        synchronized(lock2) {
            try { Thread.sleep(50); } catch (InterruptedException e) {}
            synchronized(lock1) {
                // Critical section
            }
        }
    }
}