Thanks for the hint!
I can confirm this behavior. I tested it as well and the issue is indeed caused by the “show template” setting. As soon as show template is disabled, blocks can be duplicated and edited without any issues, and no duplicate IDs are generated anymore. Many thanks for sharing this — it finally solved a problem I’ve been struggling with for months. So this definitely seems to be a glitch related to that option. Hopefully this helps others who are running into the same problem.
Hello @ciorici
Thank you very much for the super-fast response. It’s wonderful that the problem was solved so quickly. Very good work! Great plugin!