If you throw items on the ground during a rain storm and use a flint & steel to attempt to destroy the items then eventually the items will appear to have been destroyed.  However if you then walk over that spot again all of the items will go back into your inventory.

It requires spamming the flint to replicate this, which makes sense because you are in the rain after all.  Previously this was not the behavior and I'm not sure the exact version that this bug was introduced but it was before the current version 1.17.11 but I don't believe it has been this way very long.

Video attached was done in creative, however it was first noticed in survival.