The bug
Previously, /scoreboard players add <selector> <objective> 0
was the only way to store on a scoreboard that a player had no score.
Now the add
subcommand only allows for integers greater than 1, making execution by players with no score, such as with /execute as @a[scores={<objective>=0}]
, impossible.
I do not know if this is a bug or a change. You can do
and then
as a workaround for now, but I agree with you that "add 0" had a great functionality and that it should be reintroduced