Yeah, BDU has the bad habit of spamming you
Go to "My documents/Sh3/data/cfg" and open the file:
main.cfg
Edit the line relevant for the radio messages, to make it the same time compression than the maximum you have (Or simply the TC you want the game to drop to when a message is received)
Here is how mine looks like:
[TIME COMPRESSION]
TimeStop=0
RealTime=1
LandProximity=128
CriticalDamage=128
CrewEfficiency=256
AirEnemyDetected=1
SoundEffects=2
CharacterAnim=4
EnemyDetected=8
RadioReport=1024
Particles=8
PrayState=128
HunterState=128
3DRender=32
Maximum=1024