Disabling fast charging has no effect

Expected Behavior

When Fast Charging option is disabled, it should be able to charge battery in slow mode (i.e., non-fast).

Current Behavior

Even if Fast Charge is disabled, it still charges in fast mode.

Steps to Reproduce

Device information

/device starlte /version lineage-20 /date 2023-06-26 /kernel 4.9.118-g6a9461f9460c /baseband G960FXXUHFVB4 /mods Google Apps

I have read the directions.