Not all Hyperlapse photos are being imported…

I shoot a ton of Hyperlapse videos with my drone and I am noticing anything over 150 images  taken, Lr Mobile wont import every image. I just took 300 images in my latest Hyperlapse drone flight and imported them all only to find out that of 300 images, only 250 images got imported. Why did the other 50 images not get imported? I had to go back and jot down the number of the images that didn't make the initial import and then do another import bringing the total to a correct 300 images. Most of my Hyperlapse videos consists of 125 to about 500 images per flight. This is getting annoying that I have to do two imports daily for the images that don't get imported initially. Seems like flights where I only capture 125-150 images, they all get imported with no issues. I'm using Lr Mobile on the iPad Pro only.