Shortcode display disappear, copy does not work

Dear Developer, I have been using this plugin for some months now. Today I created new tables and saw that the shortcodes are displayed for a cery short time only (less than a second), then they disappear. This happens when I look at all the tables and when editing individual tables. Clicking on Copy does not copy anything.
However, if one can read fast and is able to memorize the shortcode, it works in the shop…