Tiles get swapped in code

[livcheerful]

Describe the bug
I was working on this project and editing tiles when I started seeing the tile conditionals return incorrectly. On my screen the tiles were correct, but after refreshing the page or sharing it with someone else, the tiles were secretly wrong

My screen:

What it actually was:

Joey pointed out that a user was also hitting this
https://forum.makecode.com/t/help-plz/5878/5

To Reproduce
No great repro yet, when I made the tilemap I was doing a bunch of duplicating / editing / reediting of tiles, so I'll keep trying to do that to repro...

Desktop (please complete the following information):

• OS: Windows
• Browser Chrome 86

[jwunderl]

For reference here's the share link that I received / noticed the error in: https://makecode.com/_Xpob83JAUUCh I would suspect there's a duplicate internalId or something in the assets files~

[jwunderl]

Ahh yeah it looks like it is:

tiles8-13 are duplicated in the switch case

[jwunderl]

Easy repro: drag out tilemap block, open and make 3 custom tiles, go to asset editor, make custom tile, go to tilemap.g.ts