This is very strange and sometimes happen and sometimes don't happen.
It's not only for public stop but also own stop.
Sometimes moving from own stop or public stop to other player's stop will success, it shoul not happen.
Sometimes moving from own stop or public stop to own stop will not success, it shoul not happen.
I build all stops on cityroad.
Problem is ...
When I click own stop or public stop on cityroad, owner refused this.
When I click other player's stop on cityroad, owner don't refused this.
I don't know you can reproduced this or not.
Load test_01.sve and click 1-B and 2-B. Both of them will be refused.
Load test_02.sve and click 1-B and 2-B. Both of them will be accepted.
These are same game, I loaded test_01.sve and saved it as test_02.sve.