Dude that is a GORGEOUS guitar!
It's part of the deal with any guitar with a floating bridge because the bridge is free to move in response to every change to tension of the strings. You tune one string, and it's in tune *at that bridge position*. But when you tune the other strings the bridge moves a little in response to those changes too and everything changes a little bit. It's the same thing that happens when we bend a string and the others go temporarily flat, just that it's happening at smaller level. So tuning with floating bridge can be an iterative process, you get close and closer each time. Good news? Yes! There is are string orders that helps.
Start at the highest string (high E) and tune moving successively down in pitch through to the low E string. e, B, G,
D,
A, low
E. Why? Because strings at higher tension are less sensitive to changes in tuning caused by the bridge movement. So the strings that will stay in tune best are done first and most sensitive strings are done last. Depending on how much the tuning has shifted since you played the day before, the first time you sit down to play each day you may still have to retune two or three times, but then you're good for the playing session with only minor retunign required from time to time.
Technically, the best order would be high E,
D, B,
A, G, low
E, But that could be annoying to get used to and take longer to do. Another alternative order would be high E, B,
D,
A, G, low
E.
Oddly, this stuff is never discussed so I guess (if my Long Covid fatigue ever allows me
) it would a great video to do for YT.
