Count Overlapping Raster/Terran/View Shed Layers fails with large number of viewsheds

i generated about 1000 viewsheds with no problems. however, when i choose Count Overlapping Raster/Terran/View Shed Layers, the operation never completes, getting slower and slower around 50% to the point that even after 24 hours its only at 52%. if however I only run 200 at a time it completes within 3 minutes per 200 features. i can combine those rasters manually after but im hoping to do this with 10000 viewsheds later and was wondering if theres a way that the Count Overlapping Raster/Terran/View Shed Layers operation could be fixed to maybe handle the rasters in batches and combine them at the end automatically