Hello brilliant detectives. I got a doozy here. I can not figure out why the behaviour of the particles being emitted suddenly change at frame 250. Any insight would help me greatly. I am using the latest update of Blender Version 2.90.1 (2.90.1 2020-09-23)
Please see the file attached. 
Particle Test.blend (2.3 MB)
Ahhhhhh I figured it out. I did not realize that the soft body objects I was emitting had a end frame field set to 250.