Just bought Minecraft Bedrock for PC, running on Windows 10 with all latest updates, latest Minecraft version 1.16.201, downloaded latest CodeConnection.

• Start CodeConnection, start Minecraft, execute "/connect 192.168.1.153:19131" in Minecraft chat, connects ok
• click any tutorial in CodeConnection (e.g. "Flower Trail"), use MakeCode/Blocks language, put the simple code for tutorial and click Play button (triangle)
• go to Minecraft and try to use the code from the tutorial
• it will run for ~30 seconds and then Minecraft crashes and closes silently. Every time, no exclusions.

Tutorials that don't continuously execute code (e.g. a 1-time action call) - may work (if they run shorter than ~30sec)