winfixbuf persists after closing :Git blame, blocking buffer switches

[t0w2]

After :Git blame and closing with gq (or q), the file window retains winfixbuf=true. Any subsequent :e, :bn, or buffer switch fails with:

E1513: Cannot switch buffer. 'winfixbuf' is enabled

Workaround: :set nowinfixbuf or an autocommand on CmdlineEnter.

Neovim 0.11.6, fugitive latest (master).