playerdata XpTotal does not update itself when changing Xp with "/xp set"

The Bug:

The value of the XpTotal tag does not update itself when changing Xp (no matter if level or points) with the command "/xp set ...". It can only be changed by the command "/xp add ..."

Score is affected in the same way as XpTotal.

The command "/xp query ..." is not affected.

 

How to reproduce:

1. Add 5 xp

   /xp add @s 5
   

1. Set xp to 0

   /xp set @s 0

1. Check XpTotal

   /data get entity @s XpTotal

   --> "@s has the following entity data: 5