I would agree with you but I can replicate the issue 100 times a day

Here is a screen shot of PRTG polling the CPU usage. You can see each core spiking to 100%

Also, I am getting the following:
Error when trying to navigate to the GUI while Sabnzbd is downloading and CPU at 100%
Unrecoverable error in the server.
Traceback (most recent call last):
File "/usr/share/sabnzbdplus/cherrypy/_cpwsgi.py", line 79, in setapp
s, h, b = self.get_response()
File "/usr/share/sabnzbdplus/cherrypy/_cpwsgi.py", line 219, in get_response
response = self.request.run(meth, path, qs, rproto, headers, rfile)
File "/usr/share/sabnzbdplus/cherrypy/_cprequest.py", line 579, in run
raise cherrypy.TimeoutError()
TimeoutError
Errors from the log:
2015-03-02 14:00:32,410 ERROR: [02/Mar/2015:14:00:32] Traceback (most recent call last): File "/usr/share/sabnzbdplus/cherrypy/_cpwsgi.py", line 79, in setapp s, h, b = self.get_response() File "/usr/share/sabnzbdplus/cherrypy/_cpwsgi.py", line 219, in get_response response = self.request.run(meth, path, qs, rproto, headers, rfile) File "/usr/share/sabnzbdplus/cherrypy/_cprequest.py", line 579, in run raise cherrypy.TimeoutError() TimeoutError
2015-03-02 13:54:26,735 ERROR: [02/Mar/2015:13:54:26] Traceback (most recent call last): File "/usr/share/sabnzbdplus/cherrypy/_cpwsgi.py", line 79, in setapp s, h, b = self.get_response() File "/usr/share/sabnzbdplus/cherrypy/_cpwsgi.py", line 219, in get_response response = self.request.run(meth, path, qs, rproto, headers, rfile) File "/usr/share/sabnzbdplus/cherrypy/_cprequest.py", line 579, in run raise cherrypy.TimeoutError() TimeoutError
2015-03-02 13:54:26,735 ERROR: [02/Mar/2015:13:54:26] Traceback (most recent call last): File "/usr/share/sabnzbdplus/cherrypy/_cpwsgi.py", line 79, in setapp s, h, b = self.get_response() File "/usr/share/sabnzbdplus/cherrypy/_cpwsgi.py", line 219, in get_response response = self.request.run(meth, path, qs, rproto, headers, rfile) File "/usr/share/sabnzbdplus/cherrypy/_cprequest.py", line 579, in run raise cherrypy.TimeoutError() TimeoutError
2015-03-02 13:54:26,730 ERROR: [02/Mar/2015:13:54:26] Traceback (most recent call last): File "/usr/share/sabnzbdplus/cherrypy/_cpwsgi.py", line 79, in setapp s, h, b = self.get_response() File "/usr/share/sabnzbdplus/cherrypy/_cpwsgi.py", line 219, in get_response response = self.request.run(meth, path, qs, rproto, headers, rfile) File "/usr/share/sabnzbdplus/cherrypy/_cprequest.py", line 579, in run raise cherrypy.TimeoutError() TimeoutError