I do feel inside picking is more awkward than outside with this mechanic - changing strings on an upstroke on a lower to a downstroke on a higher string feels off. I think @Tom_Gilroy mentions this as a possibility in his video on picking Mode 1 which I think I’m somewhat close to here.
In particular, I feel like that outside string change on 5 string box arpeggio shapes from the A string to the D string throws me off in the ascending direction a lot.
I also have difficulty maintaining my grip without my thumb wanting to slide forward which you see in the video.
I keep making a lot of progress with this though -