The value of properties($$).xx seems to be wrong

[cooper-lzy]

When using the concat function, properties($$).xx seems to have the wrong value, and is instead the name of the starting vertex.

before：

GO FROM "player100" over follow \
YIELD concat(follow._src, $^.player.age, $$.player.name, follow.degree) AS A;

now：

GO FROM "player100" over follow \
YIELD concat_ws(" ",follow._src, $^.player.age, $$.player.name, follow.degree) AS A;