Pressing the button on the dispenser in the configuration shown in the attached screenshot will create an arrow which, when teleported to, shows the player’s coördinates as XYZ: NaN / NaN / NaN.
Steps to reproduce
1. Build the redstone device in the screenshot. Orientation may be important (not yet confirmed).
2. Put some arrows in the dispenser (which is facing toward the slime block, i.e. west in this configuration). The repeater’s delay should also be set to 1.
3. Press the button.
4. Type “{{/tp @p @e[type=Arrow,c=1]}}” into the chat and press enter.
5. Pressing F3 will show your player’s coördinates as “XYZ: NaN / NaN / NaN”. Running the command “{{/say @p}}” will also fail (i.e., the game appears to think the player does not exist). Relogging will fix this, but the player’s coördinates will be the same.
Attachments
Comments 3
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases. If this has been done, we can reopen the issue.
Keep in mind that the "Resolved"-Status on this ticket just means "Answered", and that we are waiting for further information on whether this issue still exists or not. We will reopen it as soon as the requested information has been delivered.
It's worth uploading a world save with a test machine to allow mods to more quickly evaluate bugs (the easier their job is the more likely your bug is to get addressed). If they try and recreate the machine and get it wrong and say they can't confirm the bug you're stuck chasing them. Your screenshot is pretty dark and mods may have difficulty interpreting what they are seeing.
Make sure the behaviour you're trying to demonstrate is documented in the world with signs.
I hope that helps and that you bug gets resolved soon!