Upon loading up the game initially, there is a chance that a couple severs may show a ping of -2147483648 for a couple seconds before refreshing to the correct ping.

Steps to Reproduce:

• Close Minecraft if it's open already, reopen it, and wait for your skin to load (might be easier to reproduce if you wait a tiny bit here)
• Press "Play" and switch over to the servers tab
• Click through the featured servers, and there is a chance that one or more will display a ping of the negative 32 bit integer limit

You may need to repeat the above steps a couple times to see it.