Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] PID: 49943, TID: 752922, Thread name: com.google.Maps.LabelingBehavior, Queue name: com.apple.root.default-qos.overcommit, QoS: 21 Backtrace: 4 MobiSystems 0x0000000109a9c278 GMSIsApplicationInBackground + 53 5 MobiSystems 0x0000000109b44c78 -[GMSForegroundDispatchQueue initWithName:targetQueue:] + 237 6 MobiSystems 0x0000000109b0d2f6 _ZN7gmscore6vector4text8GlyphSetC2ERKNS_4base10reffed_ptrINS0_16TextureAtlasPoolEEEPU28objcproto17OS_dispatch_queue8NSObjectPK8__CTFontff + 344 7 MobiSystems 0x0000000109afe05e _ZN7gmscore6vector4text10GlyphCache11GetGlyphSetEPK8__CTFontf + 214 8 MobiSystems 0x0000000109afc452 _ZN7gmscore6vector4text6GLText14PrefetchGlyphsERKNS_4base10reffed_ptrINS1_10GlyphCacheEEERKNSt3__16vectorItNS9_9allocatorItEEEEPK8__CTFontf + 22 9 MobiSystems 0x0000000109afc555 _ZN7gmscore6vector4text6GLText14PrefetchGlyphsERKNS_4base10reffed_ptrINS1_10GlyphCacheEEEPK8__CTLinebf + 207 10 MobiSystems 0x0000000109ae3267 _ZN7gmscore6vector12GLPointLabel22PrefetchGlyphsForGroupEPNS0_12GLLabelGroupE + 181 11 MobiSystems 0x0000000109ae318f _ZN7gmscore6vector12GLPointLabel14PrefetchGlyphsEv + 33 12 MobiSystems 0x0000000109af7c93 _ZN7gmscore6vector16LabelingBehavior23CreatePendingOperationsERKNSt3__13setINS_4base10reffed_ptrINS0_7GLLabelEEENS2_4lessIS7_EENS2_9allocatorIS7_EEEESE_SE_NS0_13LabelDrawModeE + 1093 13 MobiSystems 0x0000000109af7609 _ZN7gmscore6vector16LabelingBehavior14RunLabelingJobERKNS_4base10reffed_ptrINS1_11LabelingJobEEE + 357 14 MobiSystems 0x0000000109af7496 ___ZN7gmscore6vector16LabelingBehavior14CommitInternalEPNS_8renderer14EntityRendererE_block_invoke + 22 15 Foundation 0x000000010ea1ba94 __NSThreadPerformPerform + 334 16 CoreFoundation 0x000000010f608e71 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 17 CoreFoundation 0x000000010f5ed56f __CFRunLoopDoSources0 + 271 18 CoreFoundation 0x000000010f5ecb1f __CFRunLoopRun + 1039 19 CoreFoundation 0x000000010f5ec499 CFRunLoopRunSpecific + 409 20 Foundation 0x000000010e9d622e -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 274 21 MobiSystems 0x0000000109b3a515 -[GMSx_GTMSimpleWorkerThread main] + 337 22 Foundation 0x000000010e9e3c7c __NSThread__start__ + 1197 23 libsystem_pthread.dylib 0x0000000110c5793b _pthread_body + 180 24 libsystem_pthread.dylib 0x0000000110c57887 _pthread_body + 0 25 libsystem_pthread.dylib 0x0000000110c5708d thread_start + 13 2017-07-05 11:24:01.164828-0400 MobiSystems[49943:752922] [reports] Main Thread Checker: UI API called on a background thread: -[UIApplication applicationState] PID: 49943, TID: 752922, Thread name: com.google.Maps.LabelingBehavior, Queue name: com.apple.root.default-qos.overcommit, QoS: 21 Backtrace: 4 MobiSystems 0x0000000109a9c278 GMSIsApplicationInBackground + 53 5 MobiSystems 0x0000000109b44c78 -[GMSForegroundDispatchQueue initWithName:targetQueue:] + 237 6 MobiSystems 0x0000000109b0d2f6 _ZN7gmscore6vector4text8GlyphSetC2ERKNS_4base10reffed_ptrINS0_16TextureAtlasPoolEEEPU28objcproto17OS_dispatch_queue8NSObjectPK8__CTFontff + 344 7 MobiSystems 0x0000000109afe05e _ZN7gmscore6vector4text10GlyphCache11GetGlyphSetEPK8__CTFontf + 214 8 MobiSystems 0x0000000109afc452 _ZN7gmscore6vector4text6GLText14PrefetchGlyphsERKNS_4base10reffed_ptrINS1_10GlyphCacheEEERKNSt3__16vectorItNS9_9allocatorItEEEEPK8__CTFontf + 22 9 MobiSystems 0x0000000109afc555 _ZN7gmscore6vector4text6GLText14PrefetchGlyphsERKNS_4base10reffed_ptrINS1_10GlyphCacheEEEPK8__CTLinebf + 207 10 MobiSystems 0x0000000109ae3267 _ZN7gmscore6vector12GLPointLabel22PrefetchGlyphsForGroupEPNS0_12GLLabelGroupE + 181 11 MobiSystems 0x0000000109ae318f _ZN7gmscore6vector12GLPointLabel14PrefetchGlyphsEv + 33 12 MobiSystems 0x0000000109af7c93 _ZN7gmscore6vector16LabelingBehavior23CreatePendingOperationsERKNSt3__13setINS_4base10reffed_ptrINS0_7GLLabelEEENS2_4lessIS7_EENS2_9allocatorIS7_EEEESE_SE_NS0_13LabelDrawModeE + 1093 13 MobiSystems 0x0000000109af7609 _ZN7gmscore6vector16LabelingBehavior14RunLabelingJobERKNS_4base10reffed_ptrINS1_11LabelingJobEEE + 357 14 MobiSystems 0x0000000109af7496 ___ZN7gmscore6vector16LabelingBehavior14CommitInternalEPNS_8renderer14EntityRendererE_block_invoke + 22 15 Foundation 0x000000010ea1ba94 __NSThreadPerformPerform + 334 16 CoreFoundation 0x000000010f608e71 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 17 CoreFoundation 0x000000010f5ed56f __CFRunLoopDoSources0 + 271 18 CoreFoundation 0x000000010f5ecb1f __CFRunLoopRun + 1039 19 CoreFoundation 0x000000010f5ec499 CFRunLoopRunSpecific + 409 20 Foundation 0x000000010e9d622e -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 274 21 MobiSystems 0x0000000109b3a515 -[GMSx_GTMSimpleWorkerThread main] + 337 22 Foundation 0x000000010e9e3c7c __NSThread__start__ + 1197 23 libsystem_pthread.dylib 0x0000000110c5793b _pthread_body + 180 24 libsystem_pthread.dylib 0x0000000110c57887 _pthread_body + 0 25 libsystem_pthread.dylib 0x0000000110c5708d thread_start + 13