OSX 12.5 crash on sizing text

Just found a new little bug, reliably reproducible.

If I am in a timeline, adding a title, and I have some text selected and resizing it..

if I accidentally slip with the mouse side-scrolling, so the text size goes down to zero ( or less?) then the entire program crashes instantly. BOOM! gone...

I can't see any "crash" logs, but I find some "wakeup" logs that seem to be about the right time, they start out like

Date/Time: 2017-01-10 15:32:57 -0800
OS Version: Mac OS X 10.12.2 (Build 16C67)
Architecture: x86_64
Report Version: 19

Command: Resolve
Path: /Applications/DaVinci Resolve/DaVinci Resolve.app/Contents/MacOS/Resolve
Version: 12.5.4 (12.5.4019)
Parent: launchd [1]
PID: 46716

Event: wakeups
Wakeups: 45108 wakeups over the last 5 seconds (9713 wakeups per second average), exceeding limit of 150 wakeups per second over 300 seconds
Duration: 4.64s
Steps: 4

Hardware model: iMac12,2
Active cpus: 8

Fan speed: 1152 rpm