Two tests failing?

[dsyme]

I've seen these tests fail in two unrelated branches now

2021-06-24T21:01:53.2616428Z   Failed Regression.NoError.Timestamps.Bug3368b [1 s]
2021-06-24T21:00:18.4256261Z   Failed Regression.ModulesFromExternalLibrariesBug5785 [1 s]

#11057
#10884

I suspect that mean a non-deterministic bug in main

cc @TIHan

[TIHan]

#11726

[KevinRansom]

Tracked by #11758