How configure hw-offload on RB1100AHx4?

How do I configure hardware offload on the RB1100AHx4?
On the RB1100AHx2 it works but the X4 does not work. How do I solve this.

RB1100AHx4 has RTL8367 switch chips, the RB1100AHx2 AR8327.

AR8327 supports bridge STP/RSTP hw offloading, the RTL8367 not.

So you cannot enable hw offload if (R)STP is enabled.

Source: https://wiki.mikrotik.com/wiki/Manual:Switch_Chip_Features

That explains why I did not get this solved.
Thank you very much