I have been having problems with the N-Body simulations for a couple of weeks; have reported it but haven't been notified of a means to resolve.

In essence, a work unit picks up, works for a while and then stops progressing while holding the CPUs. Other work unit types have no issue.

Example:
9/8/2018
08:28:52 AM | Milkyway@Home | Starting task de_nbody_7_23_2018_v170_20k__data_2_1533467104_166846_1
10:58:00 - Progress: 31.297% - Elapsed: 02:15:04 - Remaining: 04:56:50 -- Total CPU is at 8% and that seems to be one other project using the GPU
13:16:00 - Progress: 31.297% - Elapsed: 04:18:39 - Remaining: 09:27:56

Anyone else experiencing this? Is there a fix?

I have been having problems with the N-Body simulations for a couple of weeks; have reported it but haven't been notified of a means to resolve.

In essence, a work unit picks up, works for a while and then stops progressing while holding the CPUs. Other work unit types have no issue.

Example:
9/8/2018
08:28:52 AM | Milkyway@Home | Starting task de_nbody_7_23_2018_v170_20k__data_2_1533467104_166846_1
10:58:00 - Progress: 31.297% - Elapsed: 02:15:04 - Remaining: 04:56:50 -- Total CPU is at 8% and that seems to be one other project using the GPU
13:16:00 - Progress: 31.297% - Elapsed: 04:18:39 - Remaining: 09:27:56

Anyone else experiencing this? Is there a fix?

Not at this time, they have been working on it for a long time, it works great for some people but not for everyone.