That happened to me when I moved to the US from Germany. When my accent was stronger people talked slower which made it easy to understand. Then my accent got b

That happened to me when I moved to the US from Germany. When my accent was stronger people talked slower which made it easy to understand. Then my accent got better, people started speaking at their normal speed and I didn’t understand them. Same happened to me in Spanish. I can pronounce Spanish pretty well so when I was a beginner and said something to somebody in Costa Rica they responded with full speed Spanish. So I had to learn to mispronounce more.