Hi,
Because the URL you use to log in corresponds to this thread (from a bookmark, your browser history, etc.): does it end in the name of the thread after ‘/topic/’?
However, it is easy to switch to threads or subforums:

• Using the breadcrumb trail at the top of the page, click on the level you want to go

• via the Community > Forum menu on the website.

You can also bookmark this URL: https://forum.patchwork3d.com or any level URL.

Have a nice day!