Thanks. I’m glad you found it interesting.
iFixit has just released the teardown of the Air 3 and there are a few changes compared to the Pro 10.5.
In terms of similarities, the Air 3 uses the same basic layout as the Pro 10.5. There are four connectors to attach the display to the logic board, unlike the three used in the Mini 5, and the connectors are still covered by a bare metal shield. The new wireless module is located in the same position as the old one, just above the connectors.
As far as changes are concerned, the material used on the back of the lcd panel, above the display connectors, is now different from that used to cover the rest of the logic board. The material looks like it's the same as that used on the underside of the shielding. I'm speculating that this material is more heat resistant -
iPad Pro 10.5
View attachment 830110
iPad Air 3
View attachment 830111
The shield covering the wireless module appears to be separate from the rest of the logic board -
iPad Pro 10.5
View attachment 830112
iPad Air 3
View attachment 830113
I can't see any reason why these changes couldn't have been incorporated into later versions of the Pro 10.5, but we don't know whether they have.
Teardowns -
Pro 10.5 - https://www.ifixit.com/Teardown/iPad+Pro+10.5-Inch+Teardown/92534
Air 3 - https://www.ifixit.com/Teardown/iPad+Air+3+Teardown/121759
The quickest way to find out if Apple fixed the problem on refurbished iPad Pro 10.5 is to tear down a very recent one!
If the fix or patch to this issue has been confirmed, I will be more than happy to purchase a refurbished pro 10.5 instead of air 2019 mainly because of quad speakers and promotion tech.