We are currently using TPL builds in CI which only have 32 bit integer support in hypre and axom. This allows int to be used in Tribol in places where HYPRE_BigInt and tribol::IndexT are required (as well as the inverse, e.g. using tribol::IndexT instead of int) potentially leading to bugs.
We should add TPL builds with 64 bit integer support in hypre and axom to address this.