Failure download git-annex's files from UI on master branch

I had built GIN from recent master branch on my local machine to reseach GIN.
But I could not downloads git-annex's files(PDF) on UI (push download botton).
Next, building GIN from recent "live" branch on local, I can downloads git-annex's files on UI.

Comparing master and live branch,
I understood that
1. "master" use gogs/git-module, on the other hand, "live" use G-Node/git-module.
2. It is difference on internal/route/repo/download.go between two branch.
3. most recent release tag is derived from live branch.

I have some questions.
1. Why do master branch use gogs/git-module?
2. Do you plan where branch is next release ?
3. In future, will master branch be able to download git-annex's files on UI ?