Can't change level value from variable to number

[someone]

Steps to reproduce:

1. In Hubitat settings, create a Number variable with value 80.
2. Create a new Room Lights Automation
3. Select one device to automate. I selected a Lutron Caseta dimmer.
   
4. In the table under "Mode: All Modes", in the "Activation Settings (current)" > "Level" column, click the value to open the value editor.
   
5. In the value editor below, check "Use variable?" and select the variable created above and click the Save button next to it.
   
6. Click the value in the "Level" column again to open the value editor again. At this point I would expect the editor to already have "Use variable?" checked, but it isn't.
   
7. Enter the value "1" in the editor and click the Save icon next to it. At this point I would expect the value in the table to have changed from the variable name to the value "1", but it didn't.
   

I tried checking and unchecking "Use variable?" and choosing "No selection" in the variable dropdown, but I still can't change it to a number.

The same issue happens when editing values for a mode with Vary Lights Settings Per Mode selected.

As a workaround, to avoid having to delete the whole room lighting automation object to recreate it, I created a new Number variable with whatever number I wanted to put there (which in my case is "0" but the bug happens with other values too) and changed the selection to that variable.