I'm not sure if this is intended or not, but it's impossible to hit yourself with arrows, they just go through the player; that means you cannot achieve infinite flight like you can on pc. Also, I noticed that when being projected upwards by, for example, a TNT cannon, the elytra cannot be deployed whilst going up, only when falling, which I think also breaks elytra launchers.
Linked issues
Comments 2
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-18270.
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Oops, accidentally created 2 issues.