Same problem here. LabVIEW 2017 32-bit on Windows 10 64-bit.
LabVIEW freezes very often when I use "Align Objects" or "Distribute Objects" (especially when wires are selected). There are only 140 VIs in my project. Only LVOOP classes come from dependencies (NI Modbus Library, JKI JSON).
The problem is killing me as I use align and distribute functions all the time. Right now, I seriously regret switching to LabVIEW 2017 from 2015 SP1.
The issue has been reproduced and is being tracked under CAR #656295.
Looks like that was a patch released that has this CAR fixed: