export photos in Studio 2020 3.5.0 file size

So I take some TL(time-lapse) photos in jpg

then open directly from SD-card and check size (left pict)

Open Insta360 Studio 2020 3.5.0 open this TL-picts and export with original options

check size of exported from studio picttures and size almost 2-times bigger (right picts) with directly same size and other options

😲 So why?