We will, at some point move to another server provider to speed up downloads.
It won't fix every latency as some are directly related to android system and renpy engine but it'll help.
We just don't have the human resources right now.
Regarding your issue, you managed to download the file `6b65bc...` but for some reason it's not on your phone storage.
Do you have enough free space (~3G between temporary files and unpacked new files)?