I just experienced the same problem with a fresh Ubuntu 17.04 with flatpak 0.8.5:
--- snip --- [...] Found in remote gnome, do you want to install it? [y/n]: y Installing: org.gnome.Platform/x86_64/3.24 from gnome
Receiving delta parts: 0/9 -/s 0 Bytes/194,0 MB - remaining --- snip ---
So, I'm not sure if this is really fixed?
I just experienced the same problem with a fresh Ubuntu 17.04 with flatpak 0.8.5:
--- snip --- Platform/ x86_64/ 3.24 from gnome
[...]
Found in remote gnome, do you want to install it? [y/n]: y
Installing: org.gnome.
Receiving delta parts: 0/9 -/s 0 Bytes/194,0 MB - remaining
--- snip ---
So, I'm not sure if this is really fixed?