No Offline Sound

[Rezeero_]

I apologize in advance there is a more appropriate area to post this topic, please let me know if there's a better place to post this topic.

 

Recently, I've noticed that modpacks are appearing as "Offline" for me and they're appearing as such quite frequently. I can still launch modpacks that I've downloaded, of course, and everything functions fine, but the problem I'm having is that whenever I launch a modpack that's offline, I don't get any sound in game. I'm guessing that sounds are downloaded during the initial launch of the modpack, but it isn't able to while it's offline.

 

So I'm wondering if there's a remedy for this, a way to "cache" the files locally, perhaps. Any advice would be much appreciated.