Minecraft – Why won’t “falling_block” work in minecraft bedrock

I think they point up after some time.Create a clock for summoning commands.I suggest killing the old minecarts though.

I ran the command as it was stated in the question and it functions properly in minecraft 1.12.

I recommend using a tellraw generator. Using this one I got this command:

/tellraw @a [{"text":"Teleport All?","color":"blue","clickEvent":{"action":"run_command","value":"/tp @a 0 50 0"}}]

The tellraw generator allows you to enter text, desired color, and desired events and it produces a command which can be copied and pasted into minecraft.

The command it produces has square brackets [ ] that your command does not.