Slow cooking times at Chez Llama?

It has literally taken me as long as three days to finish a meal there: 12 hours to get seated, another 12 to order, about a full day for the food to arrive, about a day to eat, and then when it looked like they were never going to be able to pay and leave, I just hit debug and sent them home. I had to keep using cheats the whole time to keep them from dying while they waited for their food. Chez Llama is the worst, which is why I rarely go there, but all the restaurants take at least a day to complete a meal, if you can complete it at all, with the exception of one very small place that I created myself, and it still takes a good 12 hours to get through the meal there. There's another one I have where the chef literally stands outside all night and never goes to the cooking station; I'm confident that it's not a routing issue, because the kitchen is a wide-open clear space and none of the servers ever have any issue getting back there... they just end up standing around the cooking station waiting for the chef to show up while she hangs around outside, apparently on an eternal smoke break!