Live Visualizer mixed behavior - showing old assets, crash, not applying new asset download to image

[TanyaTrana]

Devices tested: iPad and iPhone 7 Plus
Crash on iPad
Old assets (that were destroyed) shown on iPad and iPhone displays
New asset downloads not applied on iPhone

Both devices using iOS 12.x

1. Run and launch Design Up app through Xcode.
2. Accept camera permissions.
3. Select Live Visualizer
4. Default flooring will load on the camera image.
5. Select one of the 5 thumbnail tiles, select a style, select a color
6. The flooring downloads and applies to the camera image.
7. Select Close in the upper right.
8. Watching the Xcode output, all threads have stopped running.
9. At the device, select Live Visualizer

Result 1: on both iPad and iPhone - the live camera feed shows the asset from step 6
Expected result 1: All threads and assets were destroyed in the Close process in step 7. Default floor should appear instead.

10. Continue by making a new flooring selection.

Result 2: iPad results in a crash
See attached crash log
Expected result 2: no iPad crash.

003_10JAN20_Live Visualizer crash when use actions iPad.txt

11. When on iPhone and making a new flooring selection (same step as 10, but can be repeated over and over), the asset downloads but does not apply to image.

Result 3: the new selection downloads the asset but the flooring is not applied to the image in the visualizer
Expected result 3: new flooring downloaded would then appear on image in visualizer.

[TanyaTrana]

Re-tested on cb-mobile-sdk/develop at commit hash 8271c8d on iPad and with TestFlight build 1.02 (14) on iPhone 7 Plus.
Same behavior as outlined above exists on iPhone 7 Plus when using Flooring AR Beta button in Design Up app.
iPad no longer crashes when testing at commit hash listed above.
iPad now displays the same behavior as iPhone in that both devices display the first downloaded asset as the flooring, but subsequent asset downloads do not apply to the floor.

The larger issue may be Unity related, as the threads are all stopped, so the scene should be destroyed, but it is not being destroyed.

Issue still remains open for showing old assets, not applying new asset to image.