When an OOB Code contains multiples times the same character, say 3ACC for example, only 3AC is shown

I think that's because char is set as a key in this each block, which causes Svelte to fail because there is a duplicate key:

I think the fix would simply be to not use any key in this context, because keys are useful for optimizing changes, however, this value will never change.

Simply removing the (char) seems to work here: Svelte Playground
(If we try adding back (char) we get a each_key_duplicate error)

I can make a PR if needed.