Arduino RTC does not stay in sync despite use of ArduinoCloud.getLocalTime();

Official Hardware UNO Family UNO R4 WiFi
6

I'm rewriting my code to use the NTPclient.h library to sync internal RTC every minute. It's a shame that it has to be done this way but I don't see any other solution for now. My R4 WiFi RTC drifts 2 seconds each minute !

So I'm using:

timeClient.update(); // (from NTPclient.h)
currentTime = (timeClient.getEpochTime()); // (from NTPclient.h)
RTC.setTime(currentTime);  // (from RTC.h)