problem of "static point light with source length "

dear all,

I met a problem with static point light baking, when I used point light with source length.

as u can see, i put a “vertical” line light, but it baked as “horizon” line light. How can I fix it? plz

BTW, the bug only found in 4.19 version

Rotate the light 90 degress. For some reason, the light doesn’t behave like it should with regards to the direction of it.