Classic item sorters drop their named items and break sorters,

Finished guardian farm in 1.14.3, collected several chests of properly sorted loot. Using standard ImpulseSV design.

Went back after the update to spruce the area up and my item sorters keep breaking. They somehow drop their named items and then back up with unsorted items, overload the red stone signal, and ruin the whole line of sorters.

I have built this design many times and I am sure it is done correctly. It worked fine before the update.

I have only noticed this in the guardian farm. The same sorters are working fine in my main base. Guardian farm sorter handles much higher traffic than any of my other sorters but I would think that if there were too many items they would just skip the full hopper and get picked up by the next or destroyed by the lava at the end of the ice stream.

I checked chunk alignment and the whole apparatus is contained in its own chunk.

I do frequently fly in and out of the area, and the guardian farm's speed makes my computer a little laggy, these may be factors?