It can be reproduced with any qt samples, the following case is qt sample qmlsurfacelayers.

After trying to close the application by swiping, it will generate the following crash:

There are also similar issues:
https://developernote.com/2020/05/qt-app-is-deactivated-incorrectly-on-android-10-in-gesture-mode/

https://stackoverflow.com/questions/61321845/qt-app-crashes-at-the-destructor-of-stdthread-on-android-10-devices

Tested device: Huawei FLA-AL20 

Android version: 9

EMUI version: 9.1.0

D ViewRootImpl[QtActivity]: surface should not be released

E libc++abi: terminating

F libc : Fatal signal 6 (SIGABRT), code -6 (SI_TKILL) in tid 20197 (qtMainLoopThrea), pid 20023 (mlsurfacelayers)

I mlsurfacelayer: QarthPatchMonintor::CheckNotifyEvent after read, length = -1

06-08 09:59:40.978 20023 20055 I mlsurfacelayer:

I mlsurfacelayer: QarthPatchMonintor::CheckNotifyEvent

06-08 09:59:40.978 20023 20055 I mlsurfacelayer:

I mlsurfacelayer: QarthPatchMonintor::CheckNotifyEvent before read

06-08 09:59:40.978 20023 20055 I mlsurfacelayer:

I mlsurfacelayer: QarthPatchMonintor::CheckNotifyEvent after read, length = -1

06-08 09:59:40.978 20023 20055 I mlsurfacelayer:

I mlsurfacelayer: QarthPatchMonintor::CheckNotifyEvent

06-08 09:59:40.978 20023 20055 I mlsurfacelayer:

I mlsurfacelayer: QarthPatchMonintor::CheckNotifyEvent before read

06-08 09:59:40.978 20023 20055 I mlsurfacelayer:

I mlsurfacelayer: QarthPatchMonintor::CheckNotifyEvent after read, length = -1

06-08 09:59:40.978 20023 20055 I mlsurfacelayer:

I mlsurfacelayer: QarthPatchMonintor::CheckNotifyEvent

 stack-trace: 
#00 pc 0000000000022988 /system/lib64/libc.so (abort+116) 
#01 pc 0000000000047694 /system/lib64/libc++.so (abort_message+248) 
#02 pc 00000000000477b0 /system/lib64/libc++.so (demangling_terminate_handler()+44) 
#03 pc 0000000000059f3c /system/lib64/libc++.so (std::__terminate(void ())+12) 
#04 pc 0000000000059fc4 /system/lib64/libc++.so (std::terminate()+72) 
#05 pc 00000000000b2380 /system/lib64/libc++.so (std::__1::thread::~thread()+20) 
#06 pc 000000000008626c /system/lib64/libc.so (__cxa_finalize+196) 
#07 pc 000000000001c798 /system/lib64/libc.so (exit+24) 
#08 pc 000000000002ff8c /data/data/com.mydomain.abc/qt-reserved-files/plugins/platforms/android/libqtforandroid.so

devices:
Huawei nova 3i (HWINE), 3840MB RAM, Android 9
Huawei FIG-LX1 (HWFIG-H), 2816MB RAM, Android 9
Huawei HUAWEI Y9 Prime 2019 (HWSTK-HF), 3840MB RAM, Android 9