citation neededExactly, that's were codifying encounters for computation is bound to fail in 5e. 4e, which went further than any previous editions simplified this by having maps where starting positions were indicated, which meant that a number of DMs teleported characters and monsters on the map to the starting positions when combat started so that the conditions were as standard as possible. I'm not criticising that approach, but even in that case, initiative coud mean quite a bit of swinginess even before all the other dices started rolling.
I have played adventure league the entire time it was open, and I ran/playesd and played 4e from playtest through playtest and into the first year of 5e. not once have I seen this happen or even heard of it.