Hello everyone

For about 2 months I have had the problem that most Crema Delizio capsules only drip instead of running. Other varieties also do this just before the end, but it doesn't bother me. However, if it only drips right from the start, then you wait ages for your coffee and that is tedious, especially when there are visitors.
At first I thought my machine's pump was faulty, even though not all capsules were affected. So I installed the new reserve machine, but it's the same phenomenon.
Was there a bad series or something? Or what else has an influence on it?