With OXCE 2022-04-29 and the latest released hardmode expansion, the game crashed after the debriefing when going to recover a small snakeman ufo that had been shot down. The stack trace suggests that there was some problem in checkForCasualties. This didn't occur when reloading so this is likely due to RNG, but I can provide a save if that would be useful or try to get this to compile with symbols. I suppose this is an OXCE issue, not in hardmode expansion.
[17-05-2022_10-35-53] [FATAL] A fatal error has occurred: Segmentation fault.
[17-05-2022_10-35-53] [FATAL] ./OpenXcomEx(OpenXcom::CrossPlatform::stackTrace(void*)+0x36) [0x55d596eca2f6]
[17-05-2022_10-35-53] [FATAL] ./OpenXcomEx(OpenXcom::CrossPlatform::crashDump(void*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)+0x477) [0x55d596ecae97]
[17-05-2022_10-35-53] [FATAL] ./OpenXcomEx(signalLogger(int)+0x43) [0x55d596cd6903]
[17-05-2022_10-35-53] [FATAL] /lib64/libc.so.6(+0x4ead0) [0x7f7983e40ad0]
[17-05-2022_10-35-53] [FATAL] ./OpenXcomEx(OpenXcom::BattlescapeGame::checkForCasualties(OpenXcom::RuleDamageType const*, OpenXcom::BattleActionAttack, bool, bool)+0xb1e) [0x55d596df1c4e]
[17-05-2022_10-35-53] [FATAL] ./OpenXcomEx(OpenXcom::BattlescapeGame::BattlescapeGame(OpenXcom::SavedBattleGame*, OpenXcom::BattlescapeState*)+0x22e) [0x55d596df2abe]
[17-05-2022_10-35-54] [FATAL] ./OpenXcomEx(OpenXcom::BattlescapeState::BattlescapeState()+0x5bdd) [0x55d596e2877d]
[17-05-2022_10-35-54] [FATAL] ./OpenXcomEx(OpenXcom::BriefingState::btnOkClick(OpenXcom::Action*)+0x9d) [0x55d596e2eb2d]
[17-05-2022_10-35-54] [FATAL] ./OpenXcomEx(OpenXcom::InteractiveSurface::handle(OpenXcom::Action*, OpenXcom::State*)+0x15a) [0x55d596eeedea]
[17-05-2022_10-35-54] [FATAL] ./OpenXcomEx(OpenXcom::State::handle(OpenXcom::Action*)+0x73) [0x55d596fc5153]
[17-05-2022_10-35-54] [FATAL] ./OpenXcomEx(OpenXcom::Game::run()+0x342) [0x55d596eeada2]
[17-05-2022_10-35-54] [FATAL] ./OpenXcomEx(main+0x175) [0x55d596cb4455]
[17-05-2022_10-35-54] [FATAL] /lib64/libc.so.6(__libc_start_main+0xf3) [0x7f7983e2cca3]
[17-05-2022_10-35-54] [FATAL] ./OpenXcomEx(_start+0x2a) [0x55d596cbb15a]
[17-05-2022_10-35-58] [FATAL] OpenXcom has crashed: Segmentation fault.