When a full -screen mode is called, an error falls

Gantt
#1

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I don’t understand why this mistake appears and how to fix it?

#2

Hello,
I’ve checked the Full Screen Mode in version 7.0.8, and unfortunately, the issue does not reproduce on my side.

To investigate further, could you please share your full Gantt config? You can either add it to this snippet:
https://snippet.dhtmlx.com/4qpjx5jc
or send me a small test app where the issue can be reproduced.

This will help me identify what’s causing the error.