yeah, i constructed the bridge out of individual wooden planks, and when testing realized the collisions were slightly off, so i put blocking volumes in to replace the collision of the planks themselves, it improved it, but i think it still wasn't smooth enough.
and as for the timer getting stuck at 0.01, i know what you mean, and i've had this issue sometimes as well, but i've never been able to pinpoint the problem, as it only happens sometimes. for me closing the game and starting it again did the trick.