Moved the topic from Uncategorized to Roon Software Discussion
I and others had this at least in the past. I have not experienced it in months, though. I am not sure if it is supposed to be fixed or what exactly the expected behavior is if the core is offline, but I believe you must load every album once in ARC before you go offline, so that the artwork gets cached - which, if still the case, is not ideal.
Generally, the Core being online works better.
Below is a thread from Early Access testing from a few months ago, but since then the behavior probably had improved as far as I can tell, at least for ARC’s offline mode for a limited time. However, my Core is always on, so I’m not sure on your case.