It is not tipping over as 1161 does exceed 4000lb loaded.
But Lance did pretty poor engineering on this model, where there is not much frame under the slide.
Not only main frame is only 3/4 x 1.5" piece of hardwood, but there is no reinforcement in the corners, so there is a limit how much chunk of aluminium flashing and staples can hold.
Observe the front corner under the slide and whenever you have a chance - reinforce it. Lot of topics on this issue already, but there is metal channel under the slide, who end 2" before reaching the corner, where you have steel channel holding the jacks.
Adding steel bracket connecting the 2 will be great improvement in camper integrity.
I went as far as removing the 3" stripe of siding under the slide and adding 3" aluminium angle channel to keep the floor from sagging.
When leaving camper on jacks - also observe front floor. With full water tank and aged frame- the weight of the tank can start floor separation. I always support front wall, what not only helped structurally, but prevent camper from swinging when we enter.