Omega reliability results different in psych vs MBESS

with the same data set, I get different omega reliability estimates (when looking for omega hierarchical from both) with the psych and the MBESS packages.

ci.reliability(data = (full_data[, my_vector]),
type = "hierarchical", interval.type = "bca", B = 10000, conf.level = 0.95)

omega(full_data[, my_vector])

both return the output exactly as I would expect in terms of content, no errors etc, but the values are very different

Has anyone else encountered this? Any ideas why?
thank you!

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