I had the same issue - The fix was to delete the LLS calibration and recalibrate it but it wasn't intuitive how to do it:My LLS stopped working after doing the update:(
Go to the modules page, then select your FMM module. On the dropdown menu for the LLS, change it to a different size (like "Liquid Level Sensor 4") then change it back to the correct size and recalibrate it.