ACF image and fallback

in a cpt i’m displaying an image from another post set via acf using {brf_acf_field:op_logo:postid} in the custom url for the image item.

this works as long the image is set but, i’d also tried to set a fallback image in the bricks fashion using @fallback-image:234

This is not working.

{acf_op_logo @fallback-image:234} is working fine when displaying the acf image for the current post.

i guess i found what’s going wrong.

the brf_acf_field twig returns the field value, while the fallback-image returns an image item… does a fallback method for the first exist?

the other fallback method looks broken as well