Toxic Gas clouds in Standard Sleeper Cache

Hi,

I can’t find anything on Google. I am posting here in case somebody else has had the same problem. I purposefully fail hacks to make the toxic gas clouds expand and reveal a new rift in the middle section of a Standard Sleeper Cache. I can see in local that they are expanding and that the rift is being created. However, I cannot see the clouds on my screen. I am running Mac OS Mojave. I have had this problem consistently several times now. In fact, I have never seen the clouds when they expand. Problem is sometimes I make it back in and other times . . . well you know. I get killed.

Has anyone here had the same problem? Does anyone know why this is happening? If so, is there a fix? Thanks for your help.