There have been reports that stealth isn't working as it did in BG1, that if you hide, approach enemies, backstab etc and then hide again/use invisibility potions, that all enemies will traverse the map to wherever the rest of your party is (obviously even if they haven't been seen by the enemies).
So I rolled a Shadowdancer, no mods, (as an aside I think I got 40 points at level 1, 20 at 2 and only 10 over the next few levels, before 20 again at level 5-7) and tested it in the black pits. Most enemies continued to follow my character about in stealth. This is obviously with 100 in stealth and move silently.
I remember this from BG2, but always assumed it was the stalkers stealth getting too high and that problem kicking in of thieving skills resetting once maxed out.
Then I imported that character into BG1 and tested it on the rats and the other 2 enemies encountered in candlekeep, and found they didn't track my character.
In another thread (that doesn't seem to update onto the main SOD page when posted on):https://forums.beamdog.com/discussion/51893/stealth-is-broken/p2
A developer mentioned that enemies will actively search for stealth characters, but that the current system isn't optimised and needs tweaking (think that was the gist of it). @Lore
kindly mentioned that it was just the first group of enemies that were a problem.
So please share your stealth experiences, across BG1,2 and SOD, as it seems a bit unclear if it's a major problem or not.