Pressing o on commit displays an error

[nabaco]

I have neovim + fugitive + GV.
When pressing o on a commit inside the GV window, I get the following error:

Error detected while processing function 182_open:
line 11:
E16: Invalid range: 6190d7945f749d4228f868b4a1d59bc6ed7df3da
Press ENTER or type command to continue

After pressing enter I have an empty split open