Just checking to see if anyone has confirmed the issue is no longer present in 1.9.0.3 as per @Mega_Spud
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[Minecraft] Mega_Spud (Jay Wells) added a comment - 1 week ago
The issue that can result in the player either dying or falling when rejoining a world is being tracked in the related ticket MCPE-38374.
This issue with the "invisible wall" being present (often after riding a horse) should be fixed in the latest beta version (1.9.0.3).
Richard Host
Just checking to see if anyone has confirmed the issue is no longer present in 1.9.0.3 as per @Mega_Spud