Hi,
Thank you for reaching out, and we apologize for the inconvenience.
Yes, there is currently a known issue affecting both the Articles and Article Scroller addons in SP Page Builder versions 6.6.1 through 6.6.2. Due to this issue, the category selection is not functioning as expected.
Our development team is aware of the problem and is actively working on a fix. It will be included in an upcoming update.
We sincerely appreciate your patience and understanding while we work to resolve this issue. If you have any further questions, please don't hesitate to let us know.
Best regards