Interesting! Thanks a lot @Michal.Klich & @Stanislau_25. Let’s see what others say.
As you see on our releases page, we ship 4 platform-specific packages with embedded JREs, and one universal package without the JRE. Then, it’s up to the VSCode’s plugin update logic to deduce the target platform and install the correct package. I am assuming something went wrong with this service for a short period of time when you updated the plugin, so you ended up with a universal VSIX without the JRE. 