I've now manually iterated over all LED, Switch, and Diode components and directly updated their designator fields using their "row" and "col" properties. For example, an LED with row 5 and col 3 was set to designator LED_5_3, a Switch with row 7 and col 1 to SW_7_1, and a Diode with row 6 and col 2 to D_6_2.
Please refresh your project view (or reopen the schematic) to verify the updated designators. Let me know if you still face any issues.