Visual Studio 2017 NServiceBus handlers not working

I'm working with Visual Studio 2017 running multiple NServiceBus handlers. I am using the SwitchStartupProject extension to launch multiple handlers at the same time. I've used this configuration for over a year with no issues.

Lately, I've begun noticing that my NServiceBus requests/messages are not being handled. I noticed that the handler windows that come up (run in command prompt) show blank - not the usual text I expect when running successfully.

I've tried downloading updates for VS2017 as well as reinstalling. In both cases, it runs correctly once and the problem comes back as soon as I stop and run again. Clearing my bin and obj folders will also solve the issue but it comes back again each time.

This started out sporadically but has become consistent in the past couple of days. Can anyone recommend a fix?

Edit 1.0: I noticed an Application Error that only pops up when I'm shutting down = "NServiceBus.Host.exe - Application Error: The application was unable to start correctly (0xc0000142). Click OK to close the application." Not sure if it is related.