Android App Crash on Startup (only when packaged)

I have a crash problem with my game. Only happens when packaged (and both from play store and installing from .bat on pc). Crashes right after the splash screen.

Native crash at /system/lib/libc.so
in /system/lib/libc.so (ifree+399), /system/lib/libc.so (je_free+374)


Build fingerprint: ‘google/hammerhead/hammerhead:6.0.1/MOB30M/2862625:user/release-keys’
Revision: ‘11’
ABI: ‘arm’
pid: 14357, tid: 14381, name: Thread-10586 >>> veegee.zammer <<<
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0xd6cbfebf
r0 ffffff7c r1 ffffffff r2 b6cd2304 r3 1fffffff
r4 00000000 r5 95d91000 r6 aa6ff000 r7 00010000
r8 aa6fd208 r9 b6cc5594 sl 00000001 fp 9cf3a608
ip b6cbfec0 sp 9cf3a548 lr b6ca825b pc b6ca5438 cpsr 20010030

backtrace:
#00 pc 00055438 /system/lib/libc.so (ifree+399)
#01 pc 00058257 /system/lib/libc.so (je_free+374)
#02 pc 01434e10 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_ZN13FMallocBinned7Private12FreeInternalERS_Pv+708)
#03 pc 01426220 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_ZN13FMallocBinned7ReallocEPvjj+532)
#04 pc 0161b544 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_ZN6TArrayI5FName17FDefaultAllocatorE8ResizeToEi+92)
#05 pc 015fd818 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_ZN11FLinkerLoad6DetachEv+448)
#06 pc 0161d424 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_ZN14FLinkerManager12ResetLoadersEP7UObject+1176)
#07 pc 0168e9bc /data/app/veegee.zammer-1/lib/arm/libUE4.so (_Z7EndLoadv+1032)
#08 pc 0168e1ac /data/app/veegee.zammer-1/lib/arm/libUE4.so (_Z19LoadPackageInternalP8UPackagePKwjP11FLinkerLoadR4TSetI5FName15DefaultKeyFuncsIS6_Lb0EE20FDefaultSetAllocatorEP23IAssetRegistryInterface+4636)
#09 pc 0168edc8 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_Z19LoadPackageInternalP8UPackagePKwjP11FLinkerLoad+344)
#10 pc 01dce264 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_ZN7UEngine7LoadMapER13FWorldContext4FURLP15UPendingNetGameR7FString+6912)
#11 pc 01dca004 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_ZN7UEngine6BrowseER13FWorldContext4FURLR7FString+1948)
#12 pc 018b5344 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_ZN13UGameInstance17StartGameInstanceEv+820)
#13 pc 018a97c4 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_ZN11UGameEngine4InitEP11IEngineLoop+1484)
#14 pc 013aeda0 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_ZN11FEngineLoop4InitEv+1896)
#15 pc 013ad6e0 /data/app/veegee.zammer-1/lib/arm/libUE4.so (_Z11AndroidMainP11android_app+2716)
#16 pc 013b10ac /data/app/veegee.zammer-1/lib/arm/libUE4.so (android_main+120)
#17 pc 013c5e50 /data/app/veegee.zammer-1/lib/arm/libUE4.so
#18 pc 0003f45f /system/lib/libc.so (_ZL15__pthread_startPv+30)
#19 pc 00019b43 /system/lib/libc.so (__start_thread+6)

there are 2 others I also reported and have different text but not by much. libc.so and libUE4.so seem to do something wrong in all crashes.

Thanks in advance for any help! This is killing me, it worked fine on the first and second APK