Thank you for putting in so much effort, this is by far the best supported product I ever bought! 
It works fine now, it was most likely a high density causing problems as you suggested. I can actually get away with 100 kg/m3 for my fluid when using the distance field, which is great since I want the fluid's weight in the bowl to be measurable with a spring joint based scale. And it's still noticeably more stable than the mesh collider at that density. I haven't seen a single particle slip through the field, even when quickly accelerating the mortar.
Just one question though, how are your particles that small with a resolution of .75? It looks like you didn't upscale the model, so I'm somewhat confused. I've been using a resolution of 60 for the same bowl, resulting in comparable particle size to what I saw in the video.
It works fine now, it was most likely a high density causing problems as you suggested. I can actually get away with 100 kg/m3 for my fluid when using the distance field, which is great since I want the fluid's weight in the bowl to be measurable with a spring joint based scale. And it's still noticeably more stable than the mesh collider at that density. I haven't seen a single particle slip through the field, even when quickly accelerating the mortar.
Just one question though, how are your particles that small with a resolution of .75? It looks like you didn't upscale the model, so I'm somewhat confused. I've been using a resolution of 60 for the same bowl, resulting in comparable particle size to what I saw in the video.