Hello Stéphane,
I have logged the issue into our internal system so the Dev team can investigate further the case.
Sadly since I was not able to see what exactly makes the DOM Node count grow in such way I cannot offer you fix or work-around.
I am sorry for any inconvenience caused. As a small sign of our appreciation for bringing this issue to our attention I have updated your telerik points.
Regards,
Petur Subev
Telerik
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