React/TypeScript IOS 12.1 TypeError

[nastyaash]

Hello!
I have a problem with Material UI React/TypeScript app on IPhone4 IOS 12.1 only. Tha browsers I tried are Safari 12, Chrome 49.
In console it is said the following:
vendor.js:6 TypeError: Cannot read property 'root' of undefined

Does anybody have experience with such problem?

I tried to install hoist-non-react-statics following this issue #16202 but it didn't help.

Thanks in advance for any help!

[support]

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