Last night when I was still using version 3.4.5 of Sim Settlements, I was able to use the feature in IDEK's Logi Station where a level 2 station provides the same benefit as the Communication Station with Salvage Beacons. When the plot is upgraded to level 2, the use of a separate Communications Station is not needed. I was able to place the beacon in chest, received all appropriate prompts, and received a notification when a team was dispatched and when they returned. Today, I updated to 3.4.5a of Sim Settlements and attempted to place a beacon in a chest. When I did I got the message "You need to build a communications station at one of your settlements and assign a settler to it". Something in update 3.4.5a must have altered how this is working because I last played at 12:30am and it was fine. I updated at 3pm and now it is no longer working.