Introverts are very private people. Anything they share is well thought out and calculated. It's funny when people say they "know them". Nope. Not a chance. Bruh, trust me, you know nothing.
Introverts go silent when they're hurt. It's not a coping mechanism, it's a way to protect their peace. They can lash out. Get angry. Argue & fight. But they know it's not worth it. So they simply withdraw, go silent , and process their emotions in private. But you won't get it.