Bug: Email Builder crashes due to runaway event listeners (GrapesJS) → memory leak

[ravisaxena]

While editing templates, the builder progressively slows and eventually crashes. Chrome Performance Monitor shows explosive growth of JS event listeners, DOM nodes, and JS heap—consistent with an event-listener leak in/around GrapesJS component selection/trait panels.

From screenshot (attached):

CPU ~100%

JS heap size ~ 1.28 GB

DOM nodes ~ 12,203,555

JS event listeners ~ 1,365,466

Expected

Listener counts and DOM nodes remain stable; memory usage returns near baseline after deselection/close or navigation.

Impact

Editors lose unsaved work; cannot complete template creation.

@artf

[ravisaxena]

@artf any update?

[artf]

Hard to tell just from the screenshot. I didn't notice anything similar from our side. Are you able to recreate the same behavior without your custom code?

The UI seems to be fully custom, maybe related to the implementation with the framework, eg. if you're using React, ensure to always clean up event listeners on the editor.