Questions about the RemNote review process

I’m a RemNote user. I currently have more than 30,000 rems to study my country’s legislation. I’ve always believed in RemNote’s review algorithm, but today I went to manually review all my study cards.
To my surprise there are several cards I have NEVER reviewed. NEVER! I was extremely sad about this!
My review process is to make 250 cards a day at QUEUE.
I’m on version 1.3.15.
Does anyone have the same problem? Do you know how to solve it?

My suggestion is to change the algorithm to prioritize unreviewed cards. This is too important for content consolidation.