This bug is most common when standing on prims or mesh at altitude and shouldn’t happen when standing on the ground. Since Gos Boutique shoes are rigged mesh and cannot be moved on the avatar, here are some things the try to resolve the sinking.
- Make sure you are wearing the correct shoe base. You should only wear the included shoebase.
- If you have an AO, turn it off and back on.
- Adjusting your shape’s Hover value temporarily may help. Edit Shape > Body and set Hover to 51. Save the change. Then go back and Edit Shape > Body and set Hover back to 50 and save.
As a last resort if these suggestions do not work for you, Edit Shape > Body > Hover 51 and save the change.