Sentinels getting Stepped on

I have noticed that almost 60% of the sentinels that I make usually die on a titan wave because it gets stepped on. Experimenting with this, I placed a trans camera next to my sent to check its health every now and then when I am somewhere else. In 4 of those times, it dies because a titan walks into an extremely close proximity to it, then the sentinel suddenly disappears and the "So-and-so's sentinel is OUT!" message comes up. I find this very annoying, but the only solution I can point out is to lay sentinels on the ceiling more often, but this provides an easier vantage point for monsters to shoot at. Is it that the titans are stepping on the base or the swivel of the sentinel that kills it? Or is there a collision box larger than the sentinel itself that a titan can just walk over. This could deserve a look at.

Breaks my heart to see my sentinels get treated like pupaes. Just watching them get stepped on all the time.