Build 20200618-bbc43b61c3-win_x86 Crashed when initially loading Puzzle 1855. Error Exception 0xc0000374 with NTdll.dll. Quick forum searches reports probably undefined behavior or possibly missing definition causing crash.
This forum gives some good info: https://stackoverflow.com/questions/13388350/why-is-ntdll-dll-crashing-my-c-executable
This is a bug, not a suggestion.
Additional error exceptions causing Foldit to crash when initially opening puzzles 1853 and 1854. Error exception 0xe06d7363.
Workaround for all bugs include reopening Foldit and reopening puzzles and no error exceptions are given. Crashes only observed (so far) on initially opening puzzles, i.e. opening puzzles for the first time.