DT Product Tabs issue

We’ve added DT product tabs into frontpage and set two categories in it.
The whole element works on PC.
here is link: https://bbq778.com/?lang=en

as you mind find, both Beef ad Seafood are displayed correctly.
But on mobile device. It only shows ‘category’ as topic/heading. ‘beef’ and ‘seafood’ is not showing by default. Once I click category, ‘beef’ and ‘seafood’ is showing and then hiding, like blinking.

I’ve tried it on Safari and Chrome on iPhone. it shows same error.
Please let us know how to fix it.
thanks!
Harrison

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