Ensuing fanbox images ignored using gallery link, but fetched using post link

[barbedknot]

(NSFW warning)

example "post" link:
https://ranthath.fanbox.cc/posts/3389212

C:\Users\User>gallery-dl https://ranthath.fanbox.cc/posts/3389212
←[1;33mfanbox: Cookie 'FANBOXSESSID' will expire in less than 1 hour←[0m
←[1;33mfanbox: no 'FANBOXSESSID' cookie set←[0m
* .\gallery-dl\fanbox\ranthath\ranthath_3389212_2022-02-08 13_16_09_?????_0.jpg
* .\gallery-dl\fanbox\ranthath\ranthath_3389212_2022-02-08 13_16_09_?????_1.png

C:\Users\User>

example "gallery" link:

https://ranthath.fanbox.cc/
https://ranthath.fanbox.cc/posts

C:\Users\User>gallery-dl https://ranthath.fanbox.cc/
←[1;33mfanbox: Cookie 'FANBOXSESSID' has expired←[0m
←[1;33mfanbox: no 'FANBOXSESSID' cookie set←[0m
* .\gallery-dl\fanbox\ranthath\ranthath_3389212_2022-02-08 13_16_09_?????_0.jpg
* .\gallery-dl\fanbox\ranthath\ranthat...54_2022-01-23 06_53_03_?????????_0.jpg
[etc.]
C:\Users\User>