How to reproduce:

• Join a world
• Change appstore
  Example: /carpet scriptsAppStore bisumto/scarpet/contents/
• You can download scripts
  Example: /script download debugstick.sc
• Leave the world
• Rejoin the world
• Change appstore again
  Example: /carpet scriptsAppStore bisumto/scarpet/contents/
• You cannot download scripts anymore...
• Autocomplete no longer works

I believe this is caused because the store structure is reset and github has a limit for api calls (/h) without a token, so not really much can be done.

Would need confirming just in case. Also there's an issue (I think, else the issue happens but I didn't fill it) where it doesn't let you download apps knowing the path if it doesn't match the cached structure, and according to the original implementation (idea) that should be allowed.

I'm not sure about the relation beetween API limits and this issue...
Restarting the game always fixs the issue, even without waiting.

I just noticed this bug today too. There is a bug in the app store code which is causing this. I've hacked my local version of this code to work in the interim. Might put up a PR.