Just curious on how many videos you grabbed in a 24-36 hour period and how long did the block last?
MrMayor
I had completed the first 8 seasons. In about 4 nights. It was a coue mornings later, after downloading more that I got the block.
I had queued up enough just to stay under 50 per day over the course of the 21st, 22nd, 23rd and 24th. Which allowed me to get seasons 1-8.
On the 27th I added seasons 9 and 10 to the queue, again staying under 50, and started my download.
On the morning of the 28th, I check SF and saw 3 episodes had failed, I retired them which failed, and that is when I noticed the black screen in the D+ tab in SF, cleared SF cache and log folders, then tried signing back into D+ and saw the error message.
I do not know how long it was between when the downloads on the 27th stopped and the morning when I retired the remaining 3 episodes and  I discovered the block.
I installed the new router and rebooted the cable modem the afternoon of the 28th.  I didn't try to watch a movie on Disney+ until about 8pm.  
While I have watched a movies on Disney+ since being unblocked, I haven't tried downloading more yet.