Im on version 6.0.3. There is a Bug in DHTMLX Diagrams editor. The more you are zoomed in, the more it jitters when trying to move a shape. It is very troublesome.
You can set gridStep: 1, which may help reduce the issue.
How to change gridStep is explained in the documentation:
gridStep Property of Editor | DHTMLX JavaScript Diagram Docs
Alternatively, you can adjust gridStep via the UI:
We will consider this bug for our future updates, thank you for the report!
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