According to Abseil's documentation, the hash function cannot ensure consistent hash values in the case of dynamic linking:

https://github.com/abseil/abseil-cpp/blob/master/absl/hash/hash.h#L43-L46

// `absl::Hash` may also produce different values from different dynamically
// loaded libraries. For this reason, `absl::Hash` values must never cross
// boundaries in dynamically loaded libraries (including when used in types like
// hash containers.)

Even though we don't use dynamic linking for production builds we use it on some evergreen workflows.

We need to understand if this is really a problem for us.