Default Shulker Boxes become Purple Shulker Boxes After Conversion

What I Expected
The default color shulker boxes on Xbox One Edition would stay the default color after conversion.

What Happened

The default shulker boxes turned into Purple Shulker Boxes after converting my world.

Notes
Bedrock Edition has 17 shulker boxes, Console has 16. There is no purple shulker box on Console because the "purple" one is the default one. Bedrock has both a default and purple shulker box, so the one that matches the color on Console should be the one used for conversion.