Step to reproduce:

1. Create a advancement with trigger "fall_from_height"

   {
     "criteria": {
       "requirement": {
         "trigger": "minecraft:fall_from_height"
       }
     },
     "rewards": {
       "function": "namespace:fall"
     }
   }
   

2. Create a function

   advancement revoke @s only namespace:fall
   say 1
   

3. While flying in creative mode, hold down the shift key.

Expected result:
The achievement was only expected to trigger when landing on the block.

Actual result:
The achievement triggered even though the player did not land on the block.