So iPadOS 13 is working just fine as well. No obvious problems that you noticed.
One problem our sound tech had - but not sure if it is them or what... When you don't have internet on the router you are using for your sound system, and you do have an ipad with broadband on it, it prompts now with "internet not detected on wifi, use cellular?" or something like that. You have two options...
Keep trying or use cellular... When it first prompted, I think I picked to use cellular.
Later in the night, that iPad would no longer connect to the DL32, even though it was showing it in MF4.
Only after disconnecting from wifi and reconnecting did it work again.
Again - not sure if this a bug, or what option I should be picking when it prompts for that. Will try again tonight.