Ceed 1.4 T-GDI power loss

Hello Ceed driver, especially the 1.4 Turbo people here, My vehicle: 1.4 T-GDI DCT, KM stand about 4200 km. I had already 2 times a low power loss, both times a motorway ride with approx. 120 km/h, wanted to speed up then, but nothing comes. After a short time (perhaps 1 km driving distance) everything returned to normal. In the Hyundaiboard exactly a similar phenomenon with the 1.4 engine was discussed on a page-wise basis, but believe without result. Noise did not occur to me, just that the engine just didn’t turn up anymore. I know that here in the forum some drivers of the GT with the 1.6 he engine have problems with fluctuating charging pressure, should the 1.4er also be affected by this??? Looking forward to a lively information exchange. Thank you and greetings