Looks like list numbers with 3 or more digits in callouts are too wide for the space is all.
@TheFlow, this CSS fixes it in the sandbox:
.callout-content {
padding-left: var(--size-4-3);
}
You can test with this callout:
> [!NOTE]
> 98. [ ] asdf
> 99. [ ] asdf
> 100. [ ] asdf
> 101. [ ] asdf
> 102. [ ] asdf
Before:
After: