If api.txt2img use script, always output only 1 image, no matter what value of batch_size

[mit10000]

If we use script, then the txt2img only generate 1 image, even set batch_size=8
For instance
result1 = api.txt2img(prompt="a man on tropical beach",
negative_prompt="ugly, out of frame",
seed=1003,
styles=["anime"],
cfg_scale=7,
batch_size=8,
script_name="Detection Detailer",
script_args=[
'',#info
...
],

)
check
(Pdb) len(result1.images)
1
but it should be 8.
If we turn off the script, then
(Pdb) len(result1.images)
8

Seems the script causes the problem.

Can anyone help? Thanks.