Cannot Download Amazon Prime Bonus Material

[jpp72]

When downloading Sherlock Holmes TV Series, Bonus Material is not selectable. Even if i use the exact URL of the Bonus Material

https://www.primevideo.com/detail/0U520O0U14T6HMSC25AYNJ5Q00/ref=atv_dp_btf_el_prime_sd_tv_play_t1ADAAAAAA0wg0?autoplay=1&t=0

Trying to download The Abominable Bride bonus episode

[Mona]

It's not supported, but we plan to add support to Bonus Material.