In Jira Advanced Roadmaps > View Settings, there is an option to Group By specific field values, including Labels.
When grouping by Labels, the labels are treated as case-sensitive, so `my-label` is not the same as `My-Label`.
The only workaround I see is to constantly review the labels for each group to discover new case combinations users have entered, and update the Group By settings to account for those new combinations.
Are there other workarounds the community has found? This should be filed as a bug.