I am playing a save right now with only the Generations EP enabled, and all other EPs/SPs disabled. I have Go Here configured to Allow Go Here Stacking. Whenever I add any additional action to my sim's queue, the current Go Here action gets canceled.

The previous save that I was playing in had all EPs and SPs enabled, and Go Here Stacking worked fine there.

Other Go Here options, such as Disable Active Go Home and Disable Auto Grouping are working for me. The only issue I'm having is with the Stacking.

And... I just did a Total Reset from the Go Here configuration, and reconfigured my options, and Stacking is now working.

Well, immediately after I did the reset, it was working. Now, it is not working. Telling a sim to go somewhere, and then telling them to do anything else once they start moving will cancel the Go Here action.

I'm not sure what is triggering this, but here is what I have discovered so far. When I do a total reset of the Go Here settings, stacking, etc., works for a while. After several minutes, it seems to revert to not honoring any of the settings for Go Here, such as stacking, auto grouping off, etc. It is not tied in to reloading a save, and it is not tied to creating a new save.

Can you confirm you still have this issue with only NRaas mods installed?

I have not been able to recreate it in a reasonable amount of time with only NRaas mods installed. Even with all my mods installed, it is variable how long it takes to recreate it when I start a completely new game, ranging from 1 sim day to several sim days.