cnMaestro no longer properly displays SMs on firmware older than recommended

Since we have updated to version 3.1.1-r8 of cnMaestro, we have noticed that the Software Update page does not properly display SMs on firmware older than the recommended after applying the filter. For example, see below. 4.6.1 still appears in the dropdown for filtering by version, but no SMs show up after applying the filter. In previous versions, older firmwares would only be available in the filter if there was a device in the system on that version, so maybe that logic has changed?

I have the Cloud Version 3.1.1-r60 and the filter works on mine.