You asked about the device failing to boot this thread Sony - Xperia XZ2 - akari - Documentation Suggestions:
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Hi @dthisner welcome to the /e/ forum.
We seem to have had a larger number of boot issues with /e/ Recovery 1.3 than usual.
Assuming you have already flashed 1.3 /e/ Recovery, please could you try to repeat the process with 1.2 /e/ Recovery and see if this changes things in any way. This is not a risky thing to do in that the Recovery is not required to be an exact match.
