Hello, I now had the second time pressure loss on the front right, only 0.3 less than the other 3 tires, now only 1.3 residual pressure. After filling it now stops for a day, but I have a bad feeling. 2 questions about it: 1. How do you find out what it is? When the valve slips, you don’t notice anything, running surface has no visible damage or foreign body, rim has not been damaged either. I’m afraid I’m just afraid if I want a new valve or a new tire. 2. If such a loss of pressure falls under the mobility guarantee? Then I’m not even allowed to drive to the workshop, because if I’m standing on the workshop yard, the mobility guarantee won’t work.