Don't set the player to previous position when uncrouching.

src/Game/Systems/PlayerMovementSystem.cpp

@@ -273,6 +273,15 @@ void PlayerMovementSystem::updateMovementControllers(double dt)
                     size = glm::vec3(1.f, 1.f, 1.f);
                 } else {
                     size = glm::vec3(1.f, 1.6f, 1.f);
+                    if (controller->CrouchingLastFrame() && player.HasComponent("Collidable")) {
+                        // Disable jitter guard so player doesn't get stuck in the ground.
+                        (bool&)player["Collidable"]["JitterGuard"] = false;
+                        if (isOnGround) {
+                            // The collision should resolve this anyway, but 
+                            // this is more reliable, since the box gets larger.
+                            ((glm::vec3&)cTransform["Position"]).y += 0.3f;
+                        }
+                    }
                 }
             }