【ionic 4 issue】slides issue and back button issue

currently i am using ionic 4.1.1

issue 1.

slides testing on firefox is working,
chorme is not working and simulator is not working

issue 2.
tabs have three pages
–home
–about
–contact

and i create a new page call detail

when clients click on icon on home page, will push to detail page.

when clients click back button, and then click icon again, detail page back button disappear.

here is my code

same issue, slider doesnt work as expected