Hi Pedro,
I can recommend you try the logging options of the controller. In this case, a debug of the process fpapps (layer 2 and 3 control) may be help you with your problem.
#logging network process fpapps level debugging
#show logging level verbose
LOGGING LEVELS
--------------
Facility Level Sub Category Process
-------- ----- ------------ -------
arm warnings N/A N/A
network debugging N/A fpapps
security warnings N/A N/A
system warnings N/A N/A
user warnings N/A N/A
wireless warnings N/A N/A
#
You can obtain the logs with the next command (I recommend you play with "include" and "begin" options)
#show log all | include fpapps | include DHCP
When you finish, remember to disable it:
#no logging network process fpapps
#show logging level verbose
LOGGING LEVELS
--------------
Facility Level Sub Category Process
-------- ----- ------------ -------
arm warnings N/A N/A
network warnings N/A N/A
security warnings N/A N/A
system warnings N/A N/A
user warnings N/A N/A
wireless warnings N/A N/A
#
You can obtain more info in this link. :)