In late 2019, production was put on hiatus after the YouTube channel hosting the Astartes Project was hacked and taken down. After a month, the channel was reinstated and control was given back to Astartes. The only part of the project affected by the hack was Part 1, which had it's audio corrupted when the the video was brought back online by YouTube.
"Astartes" is a fan project that was originally unofficial, but was later made canon and official Warhammer media in March 2021, when Games Workshop partnered with the creator Syama Pedersen.