Thank you for your report.
The problem was confirmed. We’ll try to fix it in one of the future updates.
I’ll inform you about any progress on this issue.
We fixed your reported problem in the latest dhx.Suite update (v8.3.5).
Now the required number input works well with the empty value.
You can check it in the following snippet: https://snippet.dhtmlx.com/y39mtr2z
Please, download the latest available dhx.Suite build from your client’s area to get this fix.
Thank you for your report.
Best regards.
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