Incorrect folders created from addon with % in name

[ipsquiggle]

On Windows, I tried

VAMActivate lua%3625

This gives me an error on startup,

Error detected while processing function vam#ActivateAddons ...[snip]... vam#vcs#Checkout:
line 4:
E605: Exception not caught: Failed to checkout addon to C:\Users\username.vim\vim-addons/lua%3625.
etc.

If I look on disk, I can see that the repo has been cloned to:

C:\Users\username.vim\vim-addons\lua%3625

Note the extra backslash/folder created. It looks like a bad escape of the % or something led to an additional depth of folder being created.

[Joseph4tec]

I meet the same issue when I am trying to install AutoClose%1849.