Craft a shield, equip it in your off hand, play for a while like a couple of hours, try to right click, the shield would just move downward then move back up then does not raise to block, pressing F twice to swap the shield between main hand and return it to off hand fixes it temporarily until the bug occurs again, i have tried exiting to menu and reopening the game from launcher a few times in a row to try to speed up the occurrence of the bug to narrow down a situation where it consistently fail to raise upon right click.