Taxes on RSUs vesting while granted in another country

I joined Microsoft in Ireland. There I got RSUs granted that would go into my US Fidelity account. When vesting I would roughly pay 50 % of taxes on those to the Irish government. I then moved to the US but I am still getting RSUs that I initially got granted in Ireland since they vest over a period of 5 years. Now in the US the taxes on those stocks are much lower. The question came up whether I need to pay taxes to the irish government on the RSUs granted there generally and especially considering the tax percentage is so much higher in Ireland. So basically would I need to pay taxes on those RSUs to Ireland?