GoDaddy’s 301 redirect/forwarding has some weird random middleman URL, kills link juice?

I'm trying to use GoDaddy's 301 redirect, which is named as domain forwarding. I set up forwarding DomainA.com to DomainB.com as 301 type.

I noticed DomainA.com is still indexed in Google after ~6 months, and it has a title in SERP of DomainB.com. When I click it on Google or visit in browser, it redirects to DomainB.com, so everything is fine from UX perspective.

I've inspected DomainA.com with http://www.webconfs.com/redirect-check.php or https://httpstatus.io tool…

GoDaddy's 301 redirect/forwarding has some weird random middleman URL, kills link juice?