http://www.subsim.com/radioroom/show...+sound+contact
I decided to link it here as it may be the problem with mod's composition.
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The issue with following contacts seems to be caused by
TDW_No_Hydrophone_On_Surface_1_1_0
replacing it with
IRAI_0_0_30_No_hydrophone_on_surface
(like in previous mod lists) eliminates the problem with following contacts