Taking a look at those plugins, it looks like they both run as a pre-command hook, you could instead try using the “alternate” way of setting the sole in the culture amp plugin, which may work however multiple plugins using the same hook may be resulting in one firing before the other/in an unexpected order.
Alternatively, if you have a build or pipeline you’d like us to look at then you can email us at support@buildkite.com and we’ll be able to take a closer look. That will allow us to take a look in to things like running order if the above doesn’t solve the issue.