`LearningRateMonitor` doesn't reflect `LearningRateFinder` changes

[davidgilbertson]

Bug description

It seems that when LearningRateFinder changes the LR of my model's optimizer, this isn't reflected in the values logged by LearningRateMonitor.

I think the offending line of code is here: https://github.com/Lightning-AI/lightning/blob/master/src/pytorch_lightning/callbacks/lr_monitor.py#L187-L191 as at version 1.8.3.post1

Where trainer.optimizers returns the optimizer with the original LR value, but trainer.model.optimizers() has the updated value.

How to reproduce the bug

No response

More info

No response

[stale]

This issue has been automatically marked as stale because it hasn't had any recent activity. This issue will be closed in 7 days if no further activity occurs. Thank you for your contributions - the Lightning Team!