ARC: very low-res artwork in offline use, lockscreen shows wrong artists [Known Issues, Ticket In]

I’m hoping this thread will be acknowledged by Roon at some point, issues persist with Core 2.0 (1182) and ARC 1.0.28 (106). And with my phone in airplane mode I just got this for some downloaded content that has perfect artwork, but ARC doesn’t show it in this list. The moment I disable airplane mode, the artwork works.