Here is a side by side of the old flawed chain idler (left) and the new one on the right.
The old one didn't wrap the chain enough and led to chain skip. The new one addressed this flaw.
I did have to surf through customer service email to get it for awhile. Seems their 1st response is to tell me to adjust the deraileur. Welp, there is no deraileur of course and this flawed idler is a known problem. 3 email replies later and someone actually read my request and granted it.