Ask an Immigration Solicitor. Get an Answer ASAP.
Good afternoon, I am happy to assist you with your question today.
There should not be any issues you face as your visa is still valid and once you submit the application your status remains the same until you get your new visa.
While you are waiting for the visa, you are covered, and once you will be granted a new visa again it is fine.
It will not be an issue when it comes to your ILR too.
You are most welcome. Good luck!