Crash in MediaPickerViewController

[manuroe]

4744064383494452809 - 2017-06-05 19:23:51 +0000
Cannot remove an observer <MediaPickerViewController 0x143872c00> for the key path "capturingStillImage" from <AVCaptureStillImageOutput 0x176c23000> because it is not registered as an observer.
Application: Riot (im.vector.app)
Application version: 0.3.13 (r63)
Matrix SDK version: 0.7.11
Build: master #63
iPhone 10.3.2

Main thread: YES
(
	0   CoreFoundation                      0x000000018553aff8 <redacted> + 148
	1   libobjc.A.dylib                     0x0000000183f9c538 objc_exception_throw + 56
	2   CoreFoundation                      0x000000018553af28 <redacted> + 0
	3   Foundation                          0x0000000185f58ff0 <redacted> + 496
	4   Foundation                          0x0000000185f58adc <redacted> + 92
	5   Foundation                          0x0000000185f58a24 <redacted> + 160
 -> -[MediaPickerViewController tearDownAVCapture] (in Riot) (MediaPickerViewController.m:1130)
 -> __50-[MediaPickerViewController caughtAVRuntimeError:]_block_invoke (in Riot) (MediaPickerViewController.m:1148)
	8   libdispatch.dylib                   0x00000001843f29e0 <redacted> + 24
	9   libdispatch.dylib                   0x00000001843f29a0 <redacted> + 16
	10  libdispatch.dylib                   0x00000001843f75e8 _dispatch_main_queue_callback_4CF + 996
	11  CoreFoundation                      0x00000001854e90c8 <redacted> + 12
	12  CoreFoundation                      0x00000001854e6ce4 <redacted> + 1572
	13  CoreFoundation                      0x0000000185416da4 CFRunLoopRunSpecific + 424
	14  GraphicsServices                    0x0000000186e80074 GSEventRunModal + 100
	15  UIKit                               0x000000018b6d1058 UIApplicationMain + 208
 -> main (in Riot) (main.m:30)                  0x0000000100062d9c Riot + 257436
	17  libdyld.dylib                       0x000000018442559c <redacted> + 4
)