Looking back I think it only happened once. I have always gotten good labs from this source (Iron Lion) so I was not too concerned. I have one of their bottles right now I just reconstituted and it looks pretty clear. I am switching to another supplier primarily because of Iron Lion's prices. I was actually looking at Sigma but they are OOS so I popped over here to check out this (Opti) source.
It is also my understanding that cloudiness can also result from squirting water (accidentally) on the puck while reconstituting.
On the other hand, with something like Zepbound, I have heard that cloudiness can come from condensation (via refrigeration) and the product is still good. I have some cloudy Zepbound right now, but it has most certainly curbed my appetite.
I've never gotten a bad/infectious shot from something cloudy.