Bug report: HDHR3-US scan produces no HD channels

I have two tuners, one of which is an HDHR3-US, which requires channel scanning, the other is an HDHR4-US (Connect). The HDHR4 lists which channels are HD and which are SD, and so you can use the guide to filter by HD or SD. However, the HDHR3 does not after the scan, listing all as SD, despite many TV episodes being marked as HD. Could this be fixed?

See HDHomeRun DUAL support (legacy tuners)

Thanks. Looking forward to the workaround.