@burnout426 yes, these extensions will encounter his problem. In fact, this issue has been around for one or two years and has not been fixed, so I posted for help

As shown in the figure, the extension I am using is "Popup my Bookmarks", and the icons of bookmarks cannot be displayed.
It is worth mentioning that this issue exists in version 8.1.1, but it does not exist in version 7.1.1

Not only this extension, but also other extensions related to bookmarks will encounter this problem, such as "Bookmarkie" and "Quick Bookmarks Menu".

OS：Windows 11
version of Opera One：128.0.5790.0