this happens in the game as I try to remove a port that's being called by foreign ships - those ships continue to call at the port, waiting for load, loading and unloading.
Thank you for the report. Can you give specific steps to reproduce with a specific ship line and ports?
yes it was aeolus ships at intsand port (at the northeast of intsand, now deleted). I had a rail station and a port. I removed the port but the ships would still wait there. After removing the port completely (which makes them wait their time, but not load any pax), If I even rebuild the railway station (in another name) and leave the port removed, the ships would continue to load pax.
You can see it by loading the game from 09:50AM today, or until late afternoon, and removing the port at Intsand. Only by removing the port and the railway and bus stations completely can the line be disabled.
Thank you very much for this report - this is now found and fixed on the 10.x branch.