automatic diffoff like fugitive?

[agriffis]

I've used fugitive in the past. The sequence I'm familiar with is

• :Gvdiffsplit to diff against index
• :bd to close the fugitive buffer when I'm done
• :diffoff is automatic in the working buffer

Replicating this in gitsigns:

• :Gitsigns diffthis
• :bd to close the gitsigns index buffer
• must :diffoff in working buffer manually

If I don't :diffoff manually in the working buffer, then :Gitsigns diffthis will refuse to start later on, presumably because it's already in diff mode.

Is there something I'm missing here, that would exit diff mode automatically? Should I be doing something other than :bd on the index buffer? Thanks!