I found a somewhat cumbersome workaround for this bug:
Start up DCS as normal
Quit to desktop and make a change to the folder Saved Games/DCS/Mods/resources, put a file inside that folder to make it change in size
Start up DCS again. Now you should have DCS read the files from the Saved Games/DCS/Sounds folder.
If you compare the dcs.log files from the two startup procedures, you should find that in the second case the Saved Games folder\Sounds are loaded secondary, overwriting the RAM
2025-10-19 12:34:49.923 INFO SOUND (1240): Added sound path: ./Mods/aircraft/Bf-109K-4/Sounds
2025-10-19 12:34:50.442 INFO SOUND (Main): Added sound path: C:\Users\User\Saved Games\DCS.openbeta\Sounds