See the CodePen sample.
NumberBox with the format option specified works incorrectly if the Poland locale is applied using Intl
Answers approved by DevExpress Support
We have fixed the issue described in this ticket and will include the fix in our next maintenance update. To apply this solution before the official update, request a hotfix by clicking the corresponding link for product versions you require.
Note: Hotfixes may be unavailable for beta versions and updates that are about to be released.
We fixed this issue in our devextreme-intl integration package of version 17.2.8.