Hi
Thanks for the report.
I am very sorry for the inconvenience caused to you.
We have fix the issue from Art Theme v3.12.3. Please upgrade to the latest version(both ART theme and BM builder plugin, the latest version can be obtained on the Themeforest Download page https://themeforest.net/downloads )
Check how to update: https://doc.seatheme.net/theme/art/install-art/art-theme-update/#manual-update
Regards!
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