To be fair, Idk how long it's been since their last tour ended. But it's the first night of this tour with a new stage and maybe even sound setup so he may just need some warming up as the shows go on in the future. In my personal opinion, I do think they need to go back to playing these songs a half step down from the original key like they were doing in 2018 for Arnel to sing those notes without going flat or sharp. Because in a couple years despite being the healthy guy he is, he's probably not gonna be able to sing those songs like he used to. I love Arnel, but I do worry about him.