Does OSLog.isEnabled(type: .debug) actually work?

My iOS app has a function that logs a whole load of statistics about a particular object. Since this is only for dev purposes I don't want any of the actual statistics gathering to be run if debug logs are not enabled so I am checking OSLog.default.isEnabled(type: .debug) before doing anything. Here is the basic shell of my code:

Code Block swift
    func dumpStatistics(for item: Any) {
        func callSomeVerySlowFunc(_ object: Any) -> String {
           /* Something much more complicated than this */
            return "Hello"
        }
        guard OSLog.default.isEnabled(type: .debug) else {
            NSLog("Not dumping Statistics, debug logging is disabled")
            return
        }
        NSLog("(NSLog) dumping Statistics, debug logging is supposedly enabled")
        os_log(.debug, "(os_log)dumping Statistics, debug logging is supposedly enabled")
        let stats: String = callSomeVerySlowFunc(item)
        NSLog("(NSLog) dumping Statistics: %@", stats)
        os_log(.debug, "(os_log) dumping Statistics: %{public}@", stats)
    }

When "Show Debug Info" is enabled in Console, this is what I get (as expected):

(NSLog) dumping Statistics, debug logging is supposedly enabled

(os_log)dumping Statistics, debug logging is supposedly enabled

(NSLog) dumping Statistics: Hello

(os_log) dumping Statistics: Hello

When "Show Debug Info" is disabled, this is what I expect to get:

 Not dumping Statistics, debug logging is disabled

However, this is what I actually do get:

(NSLog) dumping Statistics, debug logging is supposedly enabled

(NSLog) dumping Statistics: Hello

This implies that OSLog.default.isEnabled(type: .debug) is always returning true, but the actual logging code itself knows it's not really enabled.

So this has the effect that I go through all the expense of calculating the statistics when I shouldn't.

(BTW - I added the NSLog calls to help me see what was really happening. I don't intend to keep them in there)

I don't think I am doing anything wrong in my code.

I'm running macOS 10.15.7 alongside two iPads, one with iOS 14.3 and one with 14.4. Both iPads are connected via USB