I'm having a problem with a side menu of Ionic 4

Hi Everyone,
I have added a side menu in my ionic app, After adding the side menu it was working perfectly but after some time the icon of the side menu become smaller and the side menu become a little bit darker. I have attached images of my code and of what I’m facing, Please help me to sort this out. Thanks,

I’m using Ionic 4 and the latest dependencies of angular js.
Please respond to me as soon as possible.


Saff Elli Khan