Hi, Santa MariaHSMuseum
Welcome to the Microsoft community.
We have not encountered an issue similar to yours. Edge automatically pinning itself to the taskbar might just be due to a minor glitch in Edge itself, which has caused the pinning function to malfunction and subsequently led to your current issue.
Threads being closed is a result of the community's processes. It is normal for any issue to be automatically closed and locked if the original poster does not respond
Best regards
Tommy Jin | Microsoft Community Support Specialist