I test in my SharePoint, and I reproduce the issue you occur.
This may happen due to a temporary glitch or a caching issue. Please follow below tips to troubleshoot the issue.
1.Clear your browser cache: Sometimes the browser cache can cause the page to not display properly. You can try clearing your browser cache or try reopening the page in Incognito mode.
2.Try using a different browser or device: Sometimes browser compatibility issues may also cause this situation. You can try accessing the page on a different browser or device to see if the problem persists.
3.Check permissions and access settings: Although you and your colleagues have "owner" permissions, you can confirm the permission settings or try to re-grant permissions to yourself and your colleagues to see if the problem is solved.
If the problem persists after trying these steps, you need to contact Microsoft phone support team for further troubleshooting.
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