I had an absolute nightmare with a pack of 1469. It's a good yeast and behaves as everyone says - explosively top fermenting, but I seem to have got a lactobacillus infection somewhere in the first pitch. Attenuation was way too high for the stated figures. I do hope it was something I did at my end rather than the lacto already being in the smackpack. I have never suffered an infection of any type before, but it's definitely lactobacillus, as it turned a TT Landlord clone a little sour and has over-attenuated a black sheep clone by 5 points. A lager and 2 kveik brews either side have not suffered, so I have to assume it's the smackpack.