I also have not entered any block movement commands.
That is what you didn't understand - there is no "block movement command", I was talking about "blocked move commands" - regular movement commands that have been blocked.
If you can do nothing, then either it's an active autorun, or one of your movement commands has been blocked and the engine waits for it to be unblocked. There is no other option (unless you have a broken script).
Your moveroute in that event is set to wait - which means that this move route WILL block if something prevents it from completing.
There is a very simple method to check if this move route is the cause, because the last command in that moveroute is already "transparent ON".
Put a different (!!!) grafic on your second event page (if there is non, I don't know if your "blank" means only the content or also the sprite).
If the old grafic remains, this move route is blocked and has not completed. If the new grafic appears, then the event has been completed but somehow the transparent command was not executed. If the event vanishes, the transparent command has been executed (and the move route has been completed and is not blocked).
If this event is OK, then either you still haven't found the autorun yet or there is another move route that cannot complete itself and blocks everything - it does not matter if you haven't found them in your previous searches, somewhere there is something like that.
If I had a dollar for everytime a user claimed "I checked everything, there is no autorun" only to come back a few days later with a "sorry, I found the autorun"...