Graphs show no data with -r greater than 1

[jaxankey]

When I use bmon r 1, things behave normally: the rate is updated every second and the graph marches by. When I use bmon r 2, the rate is updated every 2 seconds, but the graph shows nothing, whereas I expect to see the graph marching by slower. This behavior is present for all values above 1 as far as I can tell. For values below 1, it seems to just use one second.

I'm using bmon v4.0 on Ubuntu server (AWS).

[stiltgit]

same issue on Ubuntu 22.04 LTS