The following /tp syntax does not work

tp <destinationTarget> [testforblocks: Boolean]

You can /tp <destinationTarget>          e.g. /tp @r

But as soon as you enter true or false for the checkfoblocks boolean, the command does not work. It thinks the <destinationTarget> that you entered is a <victimTarget> and that the true/false is meant to be a player name.

I have only tested this on BDS not on a regular world.