Loopy HD crashes when clicking on Settings with iOS 11 Beta.

When you first download the app this problem does not exist. However, after triggering something, the app crashes whenever I try to go in to the settings screen. Deleting the app and then re-installing it solves this issue.

When the "settings crash" behaviour happens again, I have also found that turning off permissions for Microphone access stops the problem as well.

As a guess, I think this behaviour is created after I have used an external USB microphone.

Here is a screen recording:

masa.gi/Loopy.m4v

Here is part of the device log entry:

Incident Identifier: FDF6EF27-AC5E-4C4F-93CA-479D365DF7A2
CrashReporter Key:   d5c8d21e42ab0249c2ac9c793ce4978cf8c8af3e
Hardware Model:      iPad7,3
Process:             Loopy HD [2204]
Path:                /private/var/containers/Bundle/Application/B3365E38-720F-4F3C-8206-05D2BA0FA855/Loopy HD.app/Loopy HD
Identifier:          com.atastypixel.loopy-hd
Version:             64 (1.6.3)
Code Type:           ARM-64 (Native)
Role:                Foreground
Parent Process:      launchd [1]
Coalition:           com.atastypixel.loopy-hd [1318]


Date/Time:           2017-08-27 10:55:30.5404 +0200
Launch Time:         2017-08-27 10:55:15.8969 +0200
OS Version:          iPhone OS 11.0 (15A5362a)
Baseband Version:    n/a
Report Version:      104

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x0000000183cafa60
Triggered by Thread:  0

Application Specific Information:
BUG IN CLIENT OF LIBDISPATCH: trying to lock recursively

Filtered syslog:
None found

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libdispatch.dylib               0x0000000183cafa60 0x183cac000 + 14944
1   UIFoundation                    0x000000018e7a6a54 0x18e727000 + 522836
2   UIFoundation                    0x000000018e7a6a54 0x18e727000 + 522836
3   UIFoundation                    0x000000018e78ffb8 0x18e727000 + 430008
4   UIFoundation                    0x000000018e78b064 0x18e727000 + 409700
5   UIFoundation                    0x000000018e78d530 0x18e727000 + 419120
6   Loopy HD                        0x0000000102899614 0x102830000 + 431636
7   UIKit                           0x000000018d78a02c 0x18d6ad000 + 905260
8   UIKit                           0x000000018d788eec 0x18d6ad000 + 900844
9   UIKit                           0x000000018d78c554 0x18d6ad000 + 914772
10  UIKit                           0x000000018dbeed08 0x18d6ad000 + 5512456
11  UIKit                           0x000000018d9da744 0x18d6ad000 + 3331908
12  UIKit                           0x000000018d9daf7c 0x18d6ad000 + 3334012
13  UIKit                           0x000000018d78acb0 0x18d6ad000 + 908464
14  CoreFoundation                  0x00000001842ba12c 0x1841e6000 + 868652
15  CoreFoundation                  0x00000001842b96cc 0x1841e6000 + 865996
16  CoreFoundation                  0x00000001842b9430 0x1841e6000 + 865328
17  CoreFoundation                  0x00000001843369f4 0x1841e6000 + 1378804
18  CoreFoundation                  0x00000001841f03e0 0x1841e6000 + 41952
19  Foundation                      0x0000000184c0d498 0x184c07000 + 25752
20  Foundation                      0x0000000184c3c3b0 0x184c07000 + 218032
21  UIFoundation                    0x000000018e7a6aec 0x18e727000 + 522988
22  libdispatch.dylib               0x0000000183cad048 0x183cac000 + 4168
23  libdispatch.dylib               0x0000000183cb0710 0x183cac000 + 18192
24  UIFoundation                    0x000000018e7a6a54 0x18e727000 + 522836
25  UIFoundation                    0x000000018e78ffb8 0x18e727000 + 430008
26  UIFoundation                    0x000000018e78b064 0x18e727000 + 409700
27  UIFoundation                    0x000000018e78d530 0x18e727000 + 419120
28  Loopy HD                        0x0000000102899614 0x102830000 + 431636
29  UIKit                           0x000000018d78a02c 0x18d6ad000 + 905260
30  UIKit                           0x000000018d788eec 0x18d6ad000 + 900844
31  UIKit                           0x000000018d788a14 0x18d6ad000 + 899604
32  UIKit                           0x000000018d7887a4 0x18d6ad000 + 898980
33  UIKit                           0x000000018d7885b4 0x18d6ad000 + 898484
34  UIKit                           0x000000018d7813b8 0x18d6ad000 + 869304
35  UIKit                           0x000000018d780720 0x18d6ad000 + 866080
36  UIKit                           0x000000018d766058 0x18d6ad000 + 757848
37  UIKit                           0x000000018d764080 0x18d6ad000 + 749696
38  UIKit                           0x000000018d76394c 0x18d6ad000 + 747852
39  UIKit                           0x000000018d7633b4 0x18d6ad000 + 746420
40  UIKit                           0x000000018d7632dc 0x18d6ad000 + 746204
41  UIKit                           0x000000018d6b9a0c 0x18d6ad000 + 51724
42  QuartzCore                      0x00000001882eccc8 0x1881d1000 + 1162440
43  QuartzCore                      0x00000001882f0da8 0x1881d1000 + 1179048
44  QuartzCore                      0x0000000188260b50 0x1881d1000 + 588624
45  QuartzCore                      0x0000000188286f6c 0x1881d1000 + 745324
46  QuartzCore                      0x00000001881dceec 0x1881d1000 + 48876
47  QuartzCore                      0x000000018828bca4 0x1881d1000 + 765092
48  CoreFoundation                  0x00000001842b6080 0x1841e6000 + 852096
49  CoreFoundation                  0x00000001842d09dc 0x1841e6000 + 960988
50  CoreFoundation                  0x00000001842d00e0 0x1841e6000 + 958688
51  CoreFoundation                  0x00000001842cdbb4 0x1841e6000 + 949172
52  CoreFoundation                  0x00000001841ee2d8 0x1841e6000 + 33496
53  GraphicsServices                0x0000000186074f84 0x18606a000 + 44932
54  UIKit                           0x000000018d72027c 0x18d6ad000 + 471676
55  Loopy HD                        0x0000000102836494 0x102830000 + 25748
56  libdyld.dylib                   0x0000000183d1256c 0x183d11000 + 5484