I was using Minecraft 1.19.4 every day, and the problem never occurred.

it seems to occur a lot more frequently on version 1.20.

Expected Result:

The game goes back to display the Multiplayer Menu.

Observed Result:

The game freezes and is required to be restarted through Task Manager.

Steps to reproduce this:

Joining any server and then clicking the "Cancel" button. It happens really randomly.

Notes:

4 Gigabytes are allocated to the client. In total 64GB RAM is installed on my computer.

A crash report can't be generated so I decided to use the output log function and copy all into a text file