After upgrading Chateau LTE12 (RBD53G-5HacD2HnD) and Chateau 5G devices from 7.8beta2 the LEDs indicating modem signal strength stop working (no LEDs for signal strength 1-5 are working, other LEDs are working as expected), rebooting device doesn't fix the issue. Currently I have find out that manually going to LEDs section and disabling/enabling "modem signal" configuration resolves the problem and LEDs turn on and works correctly.