Changing units causes histogram to either not display data or to crash

[mx-shift]

Built at 58af58e on Fedora 39. nVidia Quadro P600 with nVidia 545.29.06 drivers.

If I import 00.0.revolution1.500_flashfloppy_v341.csv, I get a waveform display with the Y units default to volts. I can create a histogram and get data that appears to be correct.

The Y units are actually phase error measured in clock ticks so I tried to guess a more appropriate unit. Choosing either UI or dimensionless before creating a histogram, the waveform renders fine but the histogram is blank:

If I change the Y units to UI or dimensionless after opening a histogram, I get a crash:

mxshift@eps-conduit .../build/src/ngscopeclient ❯ ./ngscopeclient
Floating point exception (core dumped)