Correct way to run modal session?

My assumption has always been that [NSApp runModalForWindow:] runs a modal window in NSModalPanelRunLoopMode.

However, while -[NSApplication _doModalLoop:peek:] seems to use NSModalPanelRunLoopMode when pulling out the next event to process via nextEventMatchingMask:untilDate:inMode:dequeue:, the current runloop doesn't seem to be running in that mode, so during -[NSApplication(NSEventRouting) sendEvent:] of the modal-specific event, NSRunLoop.currentRunLoop.currentMode returns kCFRunLoopDefaultMode.

From what I can tell, this means that any event processing code that e.g. uses [NSTimer addTimer:forMode:] based on the current mode will register a timer that will not fire until the modal session ends.

Is this a bug? Or if not, is the correct way to run a modal session something like this?

[NSRunLoop.currentRunLoop performInModes:@[NSModalPanelRunLoopMode] block:^{
    [NSApp runModalForWindow:window];
}];
[NSRunLoop.currentRunLoop limitDateForMode:NSModalPanelRunLoopMode];

Alternatively, if the mode of the runloop should stay the same, I've seen suggestions to run modal sessions like this:

NSModalSession session = [NSApp beginModalSessionForWindow:theWindow];
for (;;) {
    if ([NSApp runModalSession:session] != NSModalResponseContinue)
        break;
    [NSRunLoop.currentRunLoop limitDateForMode:NSModalPanelRunLoopMode];
}
[NSApp endModalSession:session];

Which would work around the fact that the timer/callbacks were scheduled in the "wrong" mode. But running NSModalPanelRunLoopMode during a modal session seems a bit scary. Won't that potentially break the modality?