Crash on-[FXBlurView actionForLayer:forKey:] (This line is executed in main-thread)

[gathan]

Crashlytics reports a crash (frequent enough to be disturbing..)

Crashed: com.apple.main-thread FXBlurView.m line 560 -[FXBlurView actionForLayer:forKey:]

Using Version 1.6.4 Installed via Cocoa Pods

iOS: 100% iOS 9 Device: 100% iPhone The most times on iPhone 6s, some on 5s or 5c...

Crashed: com.apple.main-thread EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000010

0 libobjc.A.dylib objc_msgSend + 16 1 UIKit
-[UIViewAnimationState animationForLayer:forKey:forView:] + 824 2 UIKit
-[UIViewAnimationState actionForLayer:forKey:forView:] + 80 3 UIKit
+[UIView(Animation) defaultUIViewActionForLayer:forKey:] + 120 4 UIKit
-[UIView(UIKitManual) actionForLayer:forKey:] + 124 5 Pockee
FXBlurView.m line 560 -[FXBlurView actionForLayer:forKey:] 6 QuartzCore
-[CALayer actionForKey:] + 100 7 QuartzCore
actionForKey(CALayer, CA::Transaction, NSString) + 96 8 QuartzCore
CA::Layer::beginchange(CA::Transaction, unsigned int, objcobject&) + 172 9 QuartzCore
CA::Layer::setter(unsigned int, CAValueType, void const) + 160 10 QuartzCore
-[CALayer setOpacity:] + 48 11 UIKit
+[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] + 620 12 UIKit