Get the board FIRST, in every instance - as then you are safe, your foilboard wont get destroyed if it hits land, and you can sit on the board relaunching or drifting ashore
Never try to relaunch first - get your board asap is key.
The second thing is, at almost every spot, no matter how strong current - well, it doesnt matter, makes absolutely no difference.
Your board wont get away from you or your kite because of the current (in 99 % of the scenarios), as you are in the same current.
So dont pay attention to that.
Two things often happen - if the board is pointing downwind, even supersmall surface waves a few inches, will make a hydrofoil "pedal to the medal", meaning it dolphins downwind faster than you can get it.
The opposite can be that board is on its side, and wind will keep it from going downwind, and hard to get back to the board, even with the kite flying.
In both instances, one would think it is current playing you a trick, but it is not.
Both have got nothing to do with current - just the way it is for all of us, and why you should definitely retrieve your board immediately, as the first thing.
As you are new into hydrofoiling, you could not know this - but welcome to an awesome sport and you will get it really fast I think