This issue sounds like something I’ve noticed with my iPad Air 3. I’ve just bought my iPad this week, having never an owned an iPad previously, and I immediately installed iPadOS 13 on it, so I’m not sure if this issue is specific to this model of iPad, iPadOS 13 or Roon remote running on iPads in general.
If I have Roon running in the background whilst playing music from the queue and return to it sometime later, it appears to take some time for the queue and now playing displays to catch up. Initially, the queue looks empty and the now playing display can be many tracks out of date. I’ve even seen instances where the now playing display quickly runs through all previous tracks to catch up with where it should be before settling down to display the correct currently playing track and position within the track as if the information had become buffered but not processed and displayed. All of this can take a good 20 - 30 seconds to become synchronised sometimes, so it becomes a bit frustrating waiting to be able to get control back.
I’ve used been using Roon control on my iPhone and laptop for sometime and never had this issue, so it seems like something specific to this iPad.
Is this a known issue that others are experiencing?