My launcher shows version 5.0.3 (and has a “Play” button, not “Update”):
However, in the game, it’s showing 5.0.2:
Despite this, I am able to play the game normally, and many of the 5.0.3 changes/fixes (that I can directly observe) are present, so 5.0.3 is installed.
Seeing the last set of numbers are the same for both (81433), it’s likely just a typo?