We took your suggestion to analyse the Dom after the editor is closed and we found a class "b-sch-dirty-new"
Which is this "Proxy" that remains?
We did not find any "b-sch-dragcreator-proxy" but only "b-sch-dirty-new".
And according to our tests, this class "b-sch-dirty-new" appears right after the editor is closed, only after having double clicked onto the scheduler.
So we decided to remove it like this :
this.$refs.scheduler.schedulerEngine.element.classList.remove('b-sch-dirty-new');
Any idea?