Only first tab page shown in Edge Browser

[baminmru]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ X] Bug report  
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request

Current behavior

When I use web site in Edge browser in Tab view only first page is visible.

Other pages are blank ( only tab name visible) .

Expected behavior

Minimal reproduction of the problem with instructions

You can see a code from
https://github.com/baminmru/INV19.git

( https://github.com/baminmru/INV19/blob/master/client/src/app/invd/invd.component.html )

What is the motivation / use case for changing the behavior?

Environment

Angular version: 6.1.9


Browser:
- [ ] Chrome (desktop) version 80
- [ ] Chrome (Android) version XX
- [ ] Chrome (iOS) version XX
- [ ] Firefox version 75
- [ ] Safari (desktop) version XX
- [ ] Safari (iOS) version XX
- [ ] IE version XX
- [ X] Edge version  44.18362.449.0
 
For Tooling issues:
- Node version: 12.16.0
- Platform:   Windows 

Others: