They’re a piece of piss really. I have started saving some of the starters too in vials and chucking them in the fridge for later use
Doing some reading up, apparently Bohemian lager yeast is one of a few strains that is commonly used to ferment at ale temperatures with a lower risk of esters. One article I read said the brewer barely noticed the difference between the lager and ale he made with the strain, in fact saying the ale was very good, so that's some good news.