How is the Korando in terms of usage? Is it suitable for commuting? Does it have many issues?

2011 model of the Chery Tiggo 4WD automatic. Recently, while driving in D gear, it feels like it automatically shifts to neutral. The engine revs, but there's no power, and it takes several seconds to regain power! Seeking help from fellow car enthusiasts, what's going on???

Thank you very much for the answers from the three experts. I changed the oil a few days ago, so it's not an oil problem. The issue now is that the RPM is high when in automatic mode, and stepping on the accelerator doesn't increase speed. There's always the sound of revving, but I can't just floor it. I have to switch to manual. In manual mode, the gear displayed on the center console is too low. When driving at 90 km/h on the highway, sometimes it's in fourth gear, sometimes in fifth. On my way to work, there aren't any steep inclines or declines, so I can't keep switching between automatic and manual. I'm busy with work and can't stop driving. Sigh...

What causes the engine oil level to increase in the SsangYong Korando diesel version?

Korando diesel oil increase