Need help: Menu flicks and columns goes messy in mobile


I am slowly going to give up. When I mouse over the menu in phone design, it flicks, don’t know how to resolve it!

The next issue:
There are 3 columns in the main body, in phone design, the 3rd column either overlap the 2nd column or there is a massive gap between the columns.

The last issue:
I have a layer transition, in mobile design, the canvas extend in the right hand side.

I appreciate your help in advance.


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