When killed by Ghast Fireball with mobGriefing false, all items are instantly killed

The bug

If you get killed by a ghast (using their fireballs) and mobGriefing is set to false, your items will be killed. This may be caused by the fireball explosion after you die, which is odd because this doesn't happen with for example; creepers.

How to reproduce

1. Run:

   /gamerule mobGriefing false
   /give @s stone 500
   /setblock ~ ~ ~ minecraft:nether_portal
   

2. Summon a ghast (/summon minecraft:ghast) and press F3 + C (to save coordinates).
3. Let the ghast kill by shooting fireballs at you.
4. Return by pasting in the command you saved earlier.
   → All your items are gone