Are these llama4x4 springs? Twiss runs these and also has this issue with the front shackles inverting, lucky for him they hit the bumper as they go flat so they don't fully invert.
![Laughing :lol:](./images/smilies/icon_lol.gif)
The problem is that the springs are slightly too long to run with standard shackles, the shackle angle looks far too flat on level ground.
You could solve the issue by lowering the bumpstops to the point that they stop unptravel before the shackle inverts like Jordi says
I would probably run slightly longer shackles, maybe 30mm longer than stock so 100mm at a guess?
Then set the bumpstops to a height where the spring flattens out, this should stop the shackle inverting and give you the best flex as well
The other option is to move the front shackle mount forwards
![Laughing :lol:](./images/smilies/icon_lol.gif)