Freezes and crashes when duplicating a timeline

For the last few betas now, every time I duplicate a timeline Resolve freezes and can't recover, leaving a force close as the only solution.

The duplicated timeline is there on restart and nothing else seems affected.

I have about 20 timelines in the project, which are mostly disabled. They are all 90 minutes long if that makes a difference.

I can't duplicate this in Studio 17b5 for Windows. Seems to work fine.

I can't duplicate this in Studio 17b5 for Windows. Seems to work fine.

That's my configuration too. I wonder if my project is corrupt somehow.