Mazda MX-5 clutch jerks

Hello, as a second car I have a Mazda MX-5 NB 1.6. Year 2001 and KM approx. 80.000. For a few weeks I feel it is always more difficult to drive the car in the second gear and couple it in without the car jerking or hopping a bit. That is, it is very difficult to find a point at the coupling and give gas, where the car rolls in liquid without jerking. My observation is that it is easier with a slight climb. he has Mazda workshop checked and since I have relatively little technical know-how and you run the risk of being dragged over the table, I ask carefully what the reasons might be. Fear that there are quite a lot of sources of error for this, but maybe you have a tip on what cost-effective measures you could start with before you venture into the more expensive things. Thank you in advance and greeting, cause’n’effect