Multiple subclips don't work correctly for proxies

If you have defined subclips, you expect them to be possible sources of proxies, right?
After all, the manual says: "Once created, subclips appear and work like any other clip in DaVinci Resolve."
Unfortunately not! If you define more than one subclip from the same, longer original, a proxy is only generated for the last sub clip, not all of them. This happens if you mark several subclips. If you activate them one by one, the command works. But who wants to do this one by one for dozens of subclips?
After all, the manual says: "Once created, subclips appear and work like any other clip in DaVinci Resolve."
Unfortunately not! If you define more than one subclip from the same, longer original, a proxy is only generated for the last sub clip, not all of them. This happens if you mark several subclips. If you activate them one by one, the command works. But who wants to do this one by one for dozens of subclips?