When playing in mine craft i was building my house when (like normal) i put a 'not supposed to be there' block. so i hit it with my sword carelessly expecting it to break (LIKE NORMAL) but no. the sword was unable to break this NSBT block. so i hit it again yet it didn't break, but what i noticed was that it did have the breaking particles that are shown when a block is broken. i hit the NSBT block with my hands and it broke. NOTE: this will happen with any sword!

Reproduce>
TRY BREAKING A BLOCK IN CREATIVE WITH A SWORD
Thank You.....