'/execute anchored' applies positional offset for relative (~) coordinates

The bug

When using /execute anchored to change the anchoring context of a command, a positional offset is applied to local coordinates (the ones denoted by carets ^ ^ ^). This offset is also applied to relative coordinates (the ones denoted by tildes ~ ~ ~), which does not match behavior in Java Edition. Attached to this ticket is the same command in both editions.

Steps to reproduce

• Run the following command in chat:

  /execute anchored eyes run setblock ~ ~ ~ command_block
  

→ Block is placed at eye height, not at the feet.