Why aren't my new dimensions respecting the current layer?

If the DIMLAYER variable setting is anything other than a period (".") or "Use Current", newly created dimensions will be placed on the layer specified by the value of this variable, rather than on your current layer in the DWG drawing.

How to fix the issue

To revert back to the original behavior, type DIMLAYER and enter a period to restore dimension behavior to default settings.

Conclusion

By following these steps, you should be able to ensure that your new dimensions are created on the correct layer in your DWG drawing.