https://fiddle.sencha.com/#fiddle/35bc&view/editor

Fill the Choose State combobox with 'aaaaa', wait a second store loads all data and press enter.
Folowing error will show on the console

ext-modern-all-debug.js:117130 Uncaught TypeError: Cannot read property 'record' of undefined
at constructor.onKeyEnter (VM2969 ext-modern-all-debug.js:117130)
at constructor.handleEvent (VM2969 ext-modern-all-debug.js:60342)
at constructor. (VM2969 ext-modern-all-debug.js:5060) at constructor.processBinding (VM2969 ext-modern-all-debug.js:60104)
at constructor.handleTargetEvent (VM2969 ext-modern-all-debug.js:60066) at constructor.fire (VM2969 ext-modern-all-debug.js:14625)
at constructor.fire (VM2969 ext-modern-all-debug.js:24503) at constructor.publish (VM2969 ext-modern-all-debug.js:24466)
at constructor.publishDelegatedDomEvent (VM2969 ext-modern-all-debug.js:24485)
at constructor.doDelegatedEvent (VM2969 ext-modern-all-debug.js:24529)