Onshore bank flagging transfers to offshore account, what's the typical process?

Hey everyone, I'm setting up my first offshore account, a personal one with ABC Bank in Mauritius, for diversification. I've initiated a couple of small test transfers from my main domestic account (US based bank), and both times they've been flagged for review, requiring me to call in and explain the purpose. Is this common practice initially, or am I doing something wrong in the transfer description? Just wondering what the usual experience is like for others moving funds to these accounts, and if there's a more streamlined way to handle it after the initial setup phase. Does it eventually become a non-issue after a few successful transfers, or is it always going to be a minor hurdle?