The JCE editor has stopped working in SP Pagebuilder v 3.8.7 a few days ago.
When I open a text block, the correct text appears. When I open another text block, the text from the previous text block appears. Only when I open it the 2nd time, the correct text appears. With Tiny MCE there are no problems. After installing the older version 3.8.6 it works again and there are no problems.
I have made a screencast: hidden content
Thank you very much for your help.