I was swimming to the Island south east Corner of the Map.
Half way i suddenly Dropped my Bag and my Weapons.
I did not drop the Melee Weapon (Fireaxe).
The Stuff is swimming in the Ocean, after a while its suddenly Back equipped.
After exploring the Island, i swim back to the Main Land.
Same Stuff again, but this time i didnt stop.
After Climbing out of the Water and wait like 20-30 Seconds, the whole stuff i lose is back on his place.
Equip that dropped:
Mountain Bag, filled with Food, Meds, Ammo (Different Amount on the Back way)
M4 Rifle
The Pistol (not the Magnum)
All my Mags for the M4 (didnt have any for the Pistol)
I do not loose any clothes in the process.