[yoshider911]

In the BBP, from the topic’s attributes
When set to “fixed on top”, it will also return to its original position.
Pinned topics are displayed.

If it is fixed at the top,
I want to set it so that only the fixed first position is displayed.
Can anyone give me some advice?

[Robin W]

it could be a theme or plugin issue

Themes

As a test switch to a default theme such as twentytwenty, and see if this fixes.

Plugins

If that doesn’t work, also deactivate all plugins apart from bbpress and see if this fixes. if it does, re-enable one at a time to see which is causing the error.

If you cannot do this to your site (say because it is live) then use the ‘troubleshooting’ features of this plugin to let you test without affecting other users

Health Check & Troubleshooting

Then come back