Hey everyone,

Having an issue with the official LinkOS SDK

We're using LINK-OS-MULTIPLATFORM-SDK v1.5.1049 (https://www.zebra.com/us/en/support-downloads/printer-software/link-os-…)
to print tickets on iMZ-320 printers from iOS devices (iOS 12.1.3) and we have a lot of crashes related to communication with printer, a stack trace looks like the following

Crashed: com.apple.main-thread
EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000420104400
-[EAInputStream streamEventTrigger]
Crashed: com.apple.main-thread
0 libobjc.A.dylib 0x230990d7c objc_msgSend + 28
1 ExternalAccessory 0x248672474 -[EAInputStream streamEventTrigger] + 324
2 CoreFoundation 0x2317391f0 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 24
3 CoreFoundation 0x231739170 CFRunLoopDoSource0 + 88
4 CoreFoundation 0x231738aa8 CFRunLoopDoSources0 + 260
5 CoreFoundation 0x231733920 __CFRunLoopRun + 1040
6 CoreFoundation 0x2317331f0 CFRunLoopRunSpecific + 436
7 GraphicsServices 0x2339ac584 GSEventRunModal + 100
8 UIKitCore 0x25ea8ad40 UIApplicationMain + 212
9 Agents Sightseeing.Tech 0x104acadd8 main (main.m:14)
10 libdyld.dylib 0x2311f2bb4 start + 4

Crashed: com.apple.main-thread
EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000f7ed85410
Crashed: com.apple.main-thread
0 libobjc.A.dylib 0x18d38cd70 objc_msgSend + 16
1 Agents Sightseeing.Tech 0x1051a156c -[MfiBtPrinterConnection write:error:] + 3037132
2 Agents Sightseeing.Tech 0x1051989d8 +[SGD SET:withValue:andWithPrinterConnection:error:] + 3001400
3 Agents Sightseeing.Tech 0x104bcf1fc -[ZebraConnection selectAccessory] (ZebraConnection.m:52)

Crashed: com.apple.root.default-qos
EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000001600000024

Crashed: com.apple.root.default-qos
0 libobjc.A.dylib 0x1f7c2cd7c objc_msgSend + 28
1 ExternalAccessory 0x20f91e4e4 -[EAOutputStream close] + 140
2 Agents Sightseeing.Tech 0x10070e238 -[Zebra_EADSessionController closeSession] + 3040408
3 Agents Sightseeing.Tech 0x10070d37c -[MfiBtPrinterConnection close] + 3036636
4 Agents Sightseeing.Tech 0x10013b2e8 __34-[ZebraConnection closeConnection]_block_invoke (ZebraConnection.m:61)