I'm going to log this for information it may not be reproducible.
I opened my survival world for the first time following the 1.19.62 bedrock update on nintendo switch. Keep inventory is off and starter map is off on this world. When world opened I was at spawn (not where I logged off) with nothing in my inventory but a stater map and my experience level was reset. Went back to where I logged out in case I died and respawn point failed, but no gear there and all else exactly as it was 2 days prior to update otherwise.
I logged out (which would have been in the same spot as my last logout) to check I hadn't gone into the wrong world (a copy I'd made) but it was definitely the correct world and correct settings. I then logged back in and my inventory and gear all were restored and starter map gone. Experience was back to 23 levels. I can now log out and in normally without issue.
logout position during 1.19.61 was coordinates 159,-19,21 (or within 16 blocks) Spawn is 0,80,0
Technically issue resolved so close if you want but wanted to report in case it's useful for a bug fix or related to another issue.
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We're tracking this issue in MCPE-164765, so this ticket is being resolved and linked as a duplicate.
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This happened to me in the exact same way on Bedrock on my iOS device (iPhone 11 pro). When I was at spawn there were also a bunch of xp orbs though I hadn’t actually died