Dear Mojang Studios,

I don't know if this "bug" already has been reported.

 During the testing of a reusable blast proof TNT based sand launcher without water, I used a sticky piston retracting an ancient debris (not destructible by explosions, due to a blast resistance of 1200) to let fall a sand block 1 redstone tick before explosion. Sadly my cannon didn't worked because:

1. the sand has been destroyed
2. the sand launcher wasn't reusable because the ancient debris was destroyed.

I retried with a netherite block which is (with obsidian) the most resistant survival obtainable block.

Same result!  (It was very confusing when discovered it.)

I emited the theory, that it was the retractation which caused the vulnerability of the block.

I tested it in an independed machine and it confirmed my hypotethis.

It also works when pushing.

I don't know if it's intentional or not.

If not I hope you manage to fix.

Sincerely nietsnie64