Ok so it seems that if you exit and save underground on bedrock edition, when you re-enter the world you spawn super high up above the map and any movement causes you to fall and die. This needs to be fixed.
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Thank you for your report!
However, this issue is a Duplicate of MCPE-38374.
If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
Also, please next time create issues in the correct project.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki
Thank you for your report!
However, this issue is a Duplicate of MCPE-38374.
If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
Also, please next time create issues in the correct project.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki