sand is still affected by gravety even if held by a sticky piston

Sand is only affected by the sticky piston when it is pulled back, it does not remain "stuck" to the piston forever.

It works that way for all blocks. For instance, being next to a sticky piston doesn't prevent a second piston from pushing the block away.

Thanks. This is not a bug, just normal piston mechanics (as far as I know, correct me if I'm wrong). It's always been that way as far as I know.

As said above, this works as intended.
There for, I'm closing this.