Tracking in Fusion a 50i clip on a 25p timeline freezes

How should I track something in a 50i clip (on a 25p) timeline in Fusion? Tried both Tracker and Planar Tracker and both freeze Resolve so I need to force a shutdown?

track50i.jpg (42.03 KiB) Viewed 511 times

De-interlace into a 50p timeline. That's what DR normally does when you have set the timeline accordingly.

I'm mixing with 25p material, hence chose a 25p timeline?

Quickly tested on a 50p timeline, same problem. Track one direction, message at bottom "Frames rendered: none", the try again -> freeze? It's not a resource problem as no CPU or GPU load and tons of memory available. Deinterlace quality set to "High".