Physics Constraint behaves like rubber band despite "Locked" settings (UE 5.8.1)

Hello everyone,

I’m running into a frustrating issue with Physics Constraints in Unreal Engine 5.8.1.

My Setup:

- I’m building a block-building system similar to Minecraft, using physics-based construction.

- When the player presses a button, a line trace determines the spawn location, and a BP_BuildingBlock actor is spawned there.

- After spawning, the new block performs a line trace in all 6 directions to find neighboring blocks and attaches itself to them using a Physics Constraint component.

- All constraints are set to “Locked” mode for both Linear and Angular limits to achieve rigid connections.

The Problem: Despite all settings being set to “Locked”, the connections behave like rubber bands or springs.

The issue is especially noticeable in long chains of blocks.

Thank you in advance!

Unreal Engine 5 2026.08.13 - 01.09.43.05