While climbing sometimes I notice that WASD stop working after entering another tree or failing to climb a tree while already in a tree, but only if I used space or double click to do so. It can easily be unlocked by climbing/attempting to climb a tree using space or double click.

• Use space or double click to climb a tree.
• Do not try to climb a new tree after failing to on a tree or after climbing into the tree.
• Test Arrow Keys (or WASD) after climbing into tree.
• Repeat a few times till bug is triggered.