Memory usage grows on Android, possible memory leak

Hi,
after some runtime (2 - 8h) the app crashes with the following error. Looks like a native crash in libvosk_jni.so. How can we fix that issue?

2021-01-27 10:34:06.666 ? A/DEBUG: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
2021-01-27 10:34:06.666 ? A/DEBUG: Build fingerprint: 'Android/rk3288/rk3288:7.1.2/TEST/ROM-20190802:userdebug/test-keys'
2021-01-27 10:34:06.666 ? A/DEBUG: Revision: '0'
2021-01-27 10:34:06.666 ? A/DEBUG: ABI: 'arm'
2021-01-27 10:34:06.666 ? A/DEBUG: pid: 24511, tid: 29658, name: Thread-280 >>> de.mytest.app <<<
2021-01-27 10:34:06.666 ? A/DEBUG: signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
2021-01-27 10:34:06.675 ? A/DEBUG: Abort message: '/buildbot/src/android/ndk-release-r21/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:72: abort_message: assertion "terminating with uncaught exception of type std::bad_alloc: std::bad_alloc" failed'
2021-01-27 10:34:06.675 ? A/DEBUG: r0 00000000 r1 000073da r2 00000006 r3 00000008
2021-01-27 10:34:06.675 ? A/DEBUG: r4 5d97f978 r5 00000006 r6 5d97f920 r7 0000010c
2021-01-27 10:34:06.675 ? A/DEBUG: r8 6f3b8bad r9 00a00000 sl a9ca1008 fp 00100000
2021-01-27 10:34:06.675 ? A/DEBUG: ip 0000000c sp 5d97e858 lr a9c5b857 pc a9c5e0c0 cpsr 600f0010
2021-01-27 10:34:06.710 ? A/DEBUG: backtrace:
2021-01-27 10:34:06.710 ? A/DEBUG: #00 pc 0004a0c0 /system/lib/libc.so (tgkill+12)
2021-01-27 10:34:06.710 ? A/DEBUG: #01 pc 00047853 /system/lib/libc.so (pthread_kill+34)
2021-01-27 10:34:06.710 ? A/DEBUG: #02 pc 0001d8b5 /system/lib/libc.so (raise+10)
2021-01-27 10:34:06.710 ? A/DEBUG: #03 pc 00019401 /system/lib/libc.so (__libc_android_abort+34)
2021-01-27 10:34:06.710 ? A/DEBUG: #04 pc 00017048 /system/lib/libc.so (abort+4)
2021-01-27 10:34:06.710 ? A/DEBUG: #05 pc 0001b8b3 /system/lib/libc.so (__libc_fatal+22)
2021-01-27 10:34:06.710 ? A/DEBUG: #06 pc 000195fb /system/lib/libc.so (__assert2+18)
2021-01-27 10:34:06.710 ? A/DEBUG: #07 pc 006f7ddf /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so
2021-01-27 10:34:06.710 ? A/DEBUG: #08 pc 006f7ee1 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so
2021-01-27 10:34:06.710 ? A/DEBUG: #09 pc 006f64a1 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so
2021-01-27 10:34:06.710 ? A/DEBUG: #10 pc 006f5d4f /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so
2021-01-27 10:34:06.710 ? A/DEBUG: #11 pc 006f5d17 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (__cxa_throw+74)
2021-01-27 10:34:06.710 ? A/DEBUG: #12 pc 006f09d3 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_Znwj+54)
2021-01-27 10:34:06.711 ? A/DEBUG: #13 pc 00260b13 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZN3fst21CompactHashStateTableINS_24DefaultComposeStateTupleIiNS_15PairFilterStateINS2_INS_18IntegerFilterStateIaEENS_17WeightFilterStateINS_17TropicalWeightTplIfEEEEEENS3_IiEEEEEENS_11ComposeHashISC_EEE9FindStateERKSC_+166)
2021-01-27 10:34:06.711 ? A/DEBUG: #14 pc 002602f5 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZN3fst8internal14ComposeFstImplINS_17DefaultCacheStoreINS_6ArcTplINS_17TropicalWeightTplIfEEEEEENS_23PushLabelsComposeFilterINS_24PushWeightsComposeFilterINS_22LookAheadComposeFilterINS_24AltSequenceComposeFilterINS_16LookAheadMatcherINS_3FstIS6_EEEESF_EESF_SF_LNS_9MatchTypeE3EEESF_SF_LSH_3EEESF_SF_LSH_3EEENS_24GenericComposeStateTableIS6_NS_15PairFilterStateINSM_INS_18IntegerFilterStateIaEENS_17WeightFilterStateIS5_EEE
2021-01-27 10:34:06.711 ? A/DEBUG: #15 pc 0025ff21 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZN3fst8internal14ComposeFstImplINS_17DefaultCacheStoreINS_6ArcTplINS_17TropicalWeightTplIfEEEEEENS_23PushLabelsComposeFilterINS_24PushWeightsComposeFilterINS_22LookAheadComposeFilterINS_24AltSequenceComposeFilterINS_16LookAheadMatcherINS_3FstIS6_EEEESF_EESF_SF_LNS_9MatchTypeE3EEESF_SF_LSH_3EEESF_SF_LSH_3EEENS_24GenericComposeStateTableIS6_NS_15PairFilterStateINSM_INS_18IntegerFilterStateIaEENS_17WeightFilterStateIS5_EEE
2021-01-27 10:34:06.711 ? A/DEBUG: #16 pc 0025e4c9 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZN3fst8internal14ComposeFstImplINS_17DefaultCacheStoreINS_6ArcTplINS_17TropicalWeightTplIfEEEEEENS_23PushLabelsComposeFilterINS_24PushWeightsComposeFilterINS_22LookAheadComposeFilterINS_24AltSequenceComposeFilterINS_16LookAheadMatcherINS_3FstIS6_EEEESF_EESF_SF_LNS_9MatchTypeE3EEESF_SF_LSH_3EEESF_SF_LSH_3EEENS_24GenericComposeStateTableIS6_NS_15PairFilterStateINSM_INS_18IntegerFilterStateIaEENS_17WeightFilterStateIS5_EEE
2021-01-27 10:34:06.711 ? A/DEBUG: #17 pc 0025417f /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZNK3fst10ComposeFstINS_6ArcTplINS_17TropicalWeightTplIfEEEENS_17DefaultCacheStoreIS4_EEE15InitArcIteratorEiPNS_15ArcIteratorDataIS4_EE+106)
2021-01-27 10:34:06.711 ? A/DEBUG: #18 pc 00264197 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZN3fst8internal13ArcMapFstImplINS_6ArcTplINS_17TropicalWeightTplIfEEEES5_NS_28RemoveSomeInputSymbolsMapperIS5_iEEE6ExpandEi+122)
2021-01-27 10:34:06.711 ? A/DEBUG: #19 pc 002635dd /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZNK3fst9ImplToFstINS_8internal13ArcMapFstImplINS_6ArcTplINS_17TropicalWeightTplIfEEEES6_NS_28RemoveSomeInputSymbolsMapperIS6_iEEEENS_3FstIS6_EEE16NumInputEpsilonsEi+90)
2021-01-27 10:34:06.711 ? A/DEBUG: #20 pc 002d5ecc /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZN5kaldi23LatticeFasterDecoderTplIN3fst3FstINS1_6ArcTplINS1_17TropicalWeightTplIfEEEEEENS_7decoder16BackpointerTokenEE18ProcessNonemittingEf+1176)
2021-01-27 10:34:06.711 ? A/DEBUG: #21 pc 002d37f4 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZN5kaldi23LatticeFasterDecoderTplIN3fst3FstINS1_6ArcTplINS1_17TropicalWeightTplIfEEEEEENS_7decoder16BackpointerTokenEE15AdvanceDecodingEPNS_18DecodableInterfaceEi+312)
2021-01-27 10:34:06.711 ? A/DEBUG: #22 pc 0023ce9f /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZN15KaldiRecognizer14AcceptWaveformERN5kaldi6VectorIfEE+126)
2021-01-27 10:34:06.711 ? A/DEBUG: #23 pc 0023cddf /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (_ZN15KaldiRecognizer14AcceptWaveformEPKci+130)
2021-01-27 10:34:06.711 ? A/DEBUG: #24 pc 002a5549 /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (vosk_recognizer_accept_waveform+4)
2021-01-27 10:34:06.711 ? A/DEBUG: #25 pc 002395ed /data/app/de.mytest.app-2/lib/arm/libvosk_jni.so (Java_org_kaldi_VoskJNI_KaldiRecognizer_1AcceptWaveform+38)
2021-01-27 10:34:06.712 ? A/DEBUG: #26 pc 004700db /data/app/de.mytest.app-2/oat/arm/base.odex (deleted) (offset 0x42de000)