What is the correct prefix for ios in this case for flex(a)?

Question

css

Good afternoon.
Please tell me why flex does not work correctly in safari ?
Flex-elements again - "floated".

All flexbox prefixes -- .box-text-text are added according to - recommendations.
At the moment, all prefixes in CODE are simply generated in the autoprefixer.
And all the same, everything floats. (
Decision No. 3 is to make a .box-text-text block on grids and everything seems to be normal, but in principle it is not normal, flexes are both "older" and simpler (for elementary architectures).
Thank you!