On a Galaxy S5 (SM-G900P) running rooted LineageOS 15.1, Android 8.1.0. Manually gave Renshuu the storage permissions.
I've tried the following downloads with these results:
Sits on Making..., never downloads.
All sizing options create a notification about permissions, does not actually open permission page nor the permission dialog. Furthermore, even after granting the permission, the same behavior occurs.
Starts Making, immediately stops, no download initiated.
I have poked around lightly on the filesystem, and as far as I can tell, there have been no downloads. I have noticed spikes in network traffic after hitting some download buttons, but since what I'm seeing is just some numbers displayed in my notification bar, I don't know for sure that these are exactly correlated or not. I might be able to do some packet sniffing when I get back on my home network, but for now this is all I've got.
Please let me know if there's anything else I can do to help!
Well, "good" news, I can replicate it on my device. I believe it happened when I swapped out certain libraries awhile back, and neglected to make sure this functionality wasn't affected. Basically, it is checking for the permission, thinking it is not there (every time), and then prompting. Since it never realizes the permission exists, it never proceeds to the download.
Will let you know when I have a patched version up on the play store!