Angular PWA tab router limitation? android back button can not go back previous page?

Hi

We are developing a PWA with Ioinc 5 + Angular + capacitor, and there is a page with 3 tabs. the current design allows each tab url to be share and reload without any issue.

However, when I open the pwa homepage, then click to open the tab page, and change tab1 to tab2 to tab3, the android back button (at the bottom in all android devices) can only move back to tab 1 from tab3, can not move back to homepage.

Is this a limitation of Angular tab routing? any way I can fix this?

thanks