I’m not sure of all the details, but here’s what I learned from testing.
On Erlang/OTP 23 [erts-11.1.7] and Elixir 1.11.3, if I let my laptop sleep with an open iex session, when it woke up, System.system_time(:second) == System.os_time(:second) evaluated to true.
On Erlang/OTP 25 [erts-13.2] and Elixir 1.14.3, doing the same evaluates to false, unless I start iex with iex --erl "+C multi_time_warp" -S mix.
