Shred can proc both landslide and boulder with aspect of nature’s savagery as far as I can tell. Which is mildly annoying when it procs boulder and tosses enemies out of your melee range.
Secondarily it’s not clear which ability modifying passives “work” with nature’s fury in general. Landslide’s modifiers for instance are passives which only work while it is on your bar, while earthen bulwark’s modifiers change the skill itself and work even when triggered without being on the bar.
I play such a build too, and while I haven’t spawned any Boulders whatsoever so far (I can imagine how annoying that would be) my Landslides spawn randomly wherever they want to, often hitting destroyable objects instead of the enemy I’m attacking in front of me.
I noticed that when Storm Strike spawns an Earth Spike, the Spike is always where I’m targeting, so Landslide is also supposed to be on my target.
If what you reported is also still true, then it’s weird to have 2 separate bugs for different people, all happening with the same skill. But both on their own are annoying enough and need to be fixed.
This build in general is not a powerhouse and it’s selling point is that it’s fun, but such bugs take a lot of the fun out of it.