Hello SilveryAG,
Thanks for reaching out to Apple Support Communities. We see you have some questions about Apple Music on your PC not working as expected, and we'd like to help.
First, make sure that iTunes for Windows is up to date: Update to the latest version of iTunes for Windows 10 - Apple Support
If the issue persists, see if the same thing happens when you download a song from Apple Music to iTunes on your PC: Add and download music in iTunes on PC - Apple Support
If it’s only happening when you’re streaming songs, make sure your router is set up with these Apple-recommended settings: Recommended settings for Wi-Fi routers and access points - Apple Support
If your music still isn’t playing correctly, please reach out to Apple Support: Get Support
Regards.