I am running TWOS 2.2.22 (upgraded from 2.2.19) and I have the following issue.
I started a new campaign, saved in the base first and then exited as per the usual instructions.
I receive radio messages just fine, but when I save and exit the game and then load the save again, the radio message dialogue is empty. I can also not browse through the days as there are no entries.
The messages are present in the RadioMessagesReceived.ini file.
Link to my savegame file.
I did a clean install of SH5 and installed the full 2.2.22 pack afterwards, but the issue is still there.