"Arriving on station" status not recognized

[MetalMania]

Hi,

I've been running a career in unmodded SH 4 v1.4, and recently had a strange issue. I'm on my 3rd patrol, assigned to the Mariana Islands. When I arrived on station (the orange star on the map) I didn't get the message from COMSUBPAC and the changing of the star color like on my first two patrols. It seems like it's not recognizing that I've arrived in the patrol zone. I drove the sub right through the star icon and out the other side with no change. I tried exiting the game and reloaded my last save point before that and tried again but same thing.

Before I started the patrol I changed out some crewmen and tried to relocate the deck gun from the bow to the stern. I guess there's a bug in the game when you do that, as now I've lost the deck gun crew positions in the crew management screen. I can live with that, unless it also breaks other things (like the patrol location status recognition). After starting the patrol, I made my customary stop at Midway to top off fuel and then headed straight for the Marianas. The only other thing different for this patrol than any of my earlier ones is the worst weather I've yet encountered in the stock game, seems like a huge storm lasting for days. Other than that, I haven't done anything different.

Are there any known bugs regarding the "on station" status being recognized? My first two patrols gave me the COMSUBPAC message when I got within around 50 miles of the star icon.