Sorry I have no other clues here, it is very unusual behavior.
One suggestion - not specific to Eleven Rack but a quick Google search of the NI forums shows a few folks having problems with Battery 4 crashing on changing rig settings with Pro Tools and maybe other DAWS. Did not notice any resolution but I did not look too hard.
e.g. Google the following
"Battery 4" crash "Pro Tools" change kit site:
www.native-instruments.com
Turns up folks with problems.
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Battery 4 crash Pro Tools "Eleven Rack" site:
www.native-instruments.com
Finds nothing.