Summary:

When converting a Minecraft Legacy Console Edition world to a Minecraft Bedrock Edition world on Nintendo Switch all double chests and double trapped chests turn into single chests.

Expected Results:

All double chests and double trapped chests stay as double chests when converting from Legacy Console Edition to Bedrock.

Observed Results:

All double chests and double trapped chests turn into single chest. They still retain all the items stored within them. 

Steps to Reproduce:

1) have a world in Minecraft Legacy Console Edition on Nintendo Switch with double chests.

2) Start Minecraft bedrock on Nintendo Switch and select "Sync Old Worlds" to get a list of all Legacy Console Edition worlds on that Switch.

3) Select the world you wish to convert to Bedrock that has double chests to start the conversion.

4) When the conversion is complete start that world in Minecraft Bedrock and observe the chests.

Notes:

This does not occur when converting Legacy Console Edition worlds on PS4 to Bedrock.

I can not confirm if this is a problem on Xbox One world conversions.

This wasn't an issue when Bedrock first came to Nintendo Switch.