when insta mining often a block appears to have been broken, when you try to walk there you start glitching and you cant walk through that block, then if you try to break the ghost block with the tool you used to insta mine nothing happens then if you switch to a different tool then when you hit that space the block reappears.

java 1.15.2 optifine - the program does not let me chose 1.15.2 idk if its me or it but it says 1.15.2 is invalid.