No sonar contacts with RFB 2.0

[WinterMute]

OK, I made a clean install, added mods, didn't notice any changes. So I removed all the mods back to stock and lo and behold - it seems to be a problem with a stock game. I kinda can't believe it, since someone surely would have noticed it, right?

I created a small custom mission for testing and hopefully attached it to this post. It's a .zip file renamed to .pdf so I could attach it. After renaming it back to zip one can unpack it to Single Missions folder and and play it. I'll be very grateful, regardless if your game is stock or not.

The mission puts you on a submerged S-boat with 3 freighters in the vicinity. A Small Old Merchant at ~0 deg, an Old Split Merchant at ~305 deg behind the horizon and a Modern Composite Merchant at ~50 deg, also behind the horizon. I can hear the Old Split Merchant at ~305 deg and none of the other two ships. I can swim close to the Small Old Merchant and still not hear it. AI may detect all three ships after a while but this changes nothing. Oddly it will report contacts on the Report Contacts button but will say No contacts! on the Follow Nearest Contact button.

If you launch a torpedo at the Small Old Merchant, it's screw sound will suddenly appear when the torpedo gets very close (like 5 last seconds before impact).

If someone could check this mission and confirm or deny my observations I'll grateful. I hope it's something on my side that I can eventually solve. Otherwise such a bug is a gamebreaker for me, now that I'm aware of it's existence...