Domain empty for non enity pages + query string not added when page is a node entity

If you turn off the defer to content translation setting, then Hreflang module should add query params to the page.

Regarding the empty href attribute, it'd help if you can write a failing test that demonstrates the issue. Otherwise all I have to work with is the screenshot, which doesn't tell me what caused the issue.

@mfb Thank you
we resolved the issue(conflict with a custom hook_language_switch_links_alter).
and thank you for the explanation about "defer to content translation setting".
i'm closing this issue.