Wrong Screen Time

Hi!

So my problem is that the 
screen time on my Iphone 12 says “7h 25min” but 
if I add up the broken times,
 it comes out much less,
 so the problem is that every single day 
it shows more than I actually used my phone,
 it's not just me, I heard this problem from 
several people, 
is there a solution?