Reproduction:
Stand next to a wall of glass panes
Logout and back in
Player will have teleported to the other side of the panes or, potentially, to a location near the spawn point but high enough in the air to potentially cause death.
Screenshots from two runs depicting both scenarios are attached.
Container log:
Executing server
NO LOG FILE! - setting up server logging...
NO LOG FILE! - [2018-12-28 05:27:39 INFO] Starting Server
NO LOG FILE! - [2018-12-28 05:27:39 INFO] Version 1.8.0.24
[2018-12-28 05:27:39 INFO] Level Name: BedrockServer
[2018-12-28 05:27:39 INFO] Game mode: 0 Survival
[2018-12-28 05:27:39 INFO] Difficulty: 3 HARD
[2018-12-28 05:27:40 INFO] IPv4 supported, port: 16821
[2018-12-28 05:27:40 INFO] IPv6 not supported
[2018-12-28 05:27:41 INFO] Server started.
...
[2018-12-28 22:11:08 INFO] Player connected: <me>
[2018-12-28 22:11:27 INFO] Player connected: <me>
[2018-12-28 22:11:57 INFO] Player disconnected: <me>
[2018-12-28 22:12:02 INFO] Player connected: <me>
[2018-12-28 22:21:37 INFO] Player disconnected: <me>
[2018-12-28 22:21:42 INFO] Player connected: <me>
[2018-12-28 22:23:09 INFO] Player disconnected: <me>
Attachments
Comments 23

This is likely related to: https://bugs.mojang.com/plugins/servlet/mobile#issue/MCPE-31242
This is likely related to: https://bugs.mojang.com/plugins/servlet/mobile#issue/MCPE-31242
This is likely related to: https://bugs.mojang.com/plugins/servlet/mobile#issue/MCPE-31242
I've not heard back from you in a while.
In order to keep the Bedrock Dedicated Server project running smoothly I'm going to request this issue be closed as Awaiting Response.
Never fear though! If this is still affecting you in the latest version (and is related to Bedrock Dedicated Server and not the Minecraft Bedrock game) all you have to do is comment and it will reopen.
If your issue does still exist but is related to the game and not the server software please head over to the Minecraft (Bedrock codebase) project.
Ionic
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 BDS Wiki – 📖 FAQs
I've not heard back from you in a while.
In order to keep the Bedrock Dedicated Server project running smoothly I'm going to request this issue be closed as Awaiting Response.
Never fear though! If this is still affecting you in the latest version (and is related to Bedrock Dedicated Server and not the Minecraft Bedrock game) all you have to do is comment and it will reopen.
If your issue does still exist but is related to the game and not the server software please head over to the Minecraft (Bedrock codebase) project.
Ionic
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 BDS Wiki – 📖 FAQs
Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki
Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki
Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki