Hello @pcoleuk,
My name is Henry Eduardo and I am happy to assist with your inquiry, and appreciate you contacting LastPass Support!
I am sorry about the issues you are having with the app. Can you please follow the steps from this article and verify if this solves your issue with the data not showing complete?
Regarding the app requiring your Master Password, you may need to check the Security Settings on it.
Please let me know if this worked or if further assistance is required.
Thank you,
Henry Eduardo | Customer Care