Does not randomise prompts when using batch img2img

[adieyal]

Discussed in https://github.com/adieyal/sd-dynamic-prompts/discussions/279

^{Originally posted by willliamahician February 28, 2023} It looks invalid when batch drawing images from a folder. It works very well when I use wildcards to batch generate text2text and image2image images (each result is random), but once I batch generate from a folder to other, the plug-in will randomly select a keyword and apply it to all images (each result is the same)