History graph ignores units


I have temperature (°C) and relative air humidity (%) sensors in my rooms. In order to save space I want to put both graphs into one history graph. But since Homeassistant neither seems to allow setting a custom x-axis text nor using of two x axis per graph with their respective units on the left and right side, I wanted to go with the temperature and humidity sensors both using a combined unit_of_measurement: "°C / %" . But for some reason the history graph only ever seems to pick up the first one in the string, even though the dev tools show the correct unit. Is this WAD? And any ideas to fix this?


If you use Apexcharts instead of the core history graph you can plot two different sensor units on the one graph.