Why are you using both (1|striker) and (striker|ballnumber)? You’re using striker both as a group and as a predictor. I guess you’re trying to use nested effects, but I’m afraid this is not the correct way. If you tell me a little more I can help
I’m not very familiar with minibatch. But as far as I understand you need to modify how the model is written (not just adding things to it) and that’s not possible.
If you’re using the default priors as they appear there, I recommend you change to something like Normal(0, 1) or Normal(0, 2). Those standard deviations together with the log-link function (which exponentiates the linear predictor) will make the computation very unstable.
Whoops, I meant ‘cumruns ~ 1 + (1|striker) + (1|striker:ballnumber)’ - wich nests the balls faced. This is some cricket (the sport) data that I am playing with to test growth modeling and vi, so I can use it with intensive longitudinal data. I wanted to look at the trajectories of batters of the South African team over a couple of seasons as a test case.