Last checked: May 4, 2022
The bug
The link for the buttons "Buy now" and "Play with PC Game Pass" within the Minecraft: Java Edition information section (accessible with an account that has not purchased Minecraft) is, for example for the "Buy now" button, [aka.ms/JavaBuyNow?ref=Launcher]. The ref=Launcher part is inconsistent with all other links, which use ref=launcher (launcher is not capitalized).
How to reproduce
Open the Minecraft Launcher
Log in with a Microsoft account that does not own Minecraft
Navigate to the Minecraft: Java Edition page
Scroll down to the information section
Click the "Buy now" button
❌ The URL in your browser containsref=Launcher, unlike the expectedref=launcher
Fixed between 2.3.200 and 2.3.217. 😃