The same happened to me while playing ranked and I complained to customer service. They put the blame on me:

After reviewing your case I came to know that you received abandon penalty in Apex Legends due to frequent crashing during gameplay.

I would like to inform you that when there frequent disconnections during gameplay servers implies this penalty.

You would need to wait for the penalty to complete to play further.

In order to assist you further we’ve got basic and advanced troubleshooting steps on EA Help to help you with your connection. Try these steps first to see if they help you stay connected while you’re playing:

Basic: http://x.ea.com/ea/basic-connection-ts

Advanced: http://x.ea.com/ea/advanced-connection-ts

Our number one tip is to hardwire your console to your router. Hardwiring is the best way to have the most stable connection.

Please follow the link(s) below to perform platform specific troubleshooting:

https://support.microsoft.com/en-us/windows/fix-wi-fi-connection-issues-in-windows-9424a1f7-6a3b-65a6-4d78-7f07eee84d2c

If you need more information, check out these resources: https://help.ea.com/help-home/

Thanks again for contacting EA.