Run History not shown when filtering by class

[KongMD-Steam]

My runs for custom classes show up in the Run History section of the game with no filters selected. However, when I filter runs by the class dropdown, the game doesn't detect any runs.

Example:

Debug output after clicking selecting the custom class in the filter dropdown menu:

18:41:13.849 INFO core.CardCrawlGame> PAUSE()
18:41:51.192 INFO core.CardCrawlGame> RESUME()
18:41:54.049 INFO runHistory.RunHistoryScreen> Attempted to load Run History with 0 runs.
18:41:55.549 INFO core.CardCrawlGame> PAUSE()

I've tried this on all known class mods and they all have the same behavior. Is it something BaseMod can fix, or is it a limitation of the vanilla game?