After a few years (4) with same hitch I noticed it was leaning down a little bit so I climbed under and this is what I found.
1 tab was broke off, 1 of the other was cracked all the way to it. Hitch was bent on the ends ! Boy was I shocked ! Got a different one from a buddy that had the same issue so he added some more support with gussets to his. I usually check this 1-2 times a year so sometime end of last season it did it, sure got lucky it didnt break ! Everyone else check yours and be sure ! Hate to see that happen to anyone !