dates limit argument GET /api/v3/klines

Hello, I tested this endpoint GET /api/v3/klines and found that when providing a startdate past about 3 weeks ago, no more older klines are returned (some klines are always received, but remains the same and start 3 weeks ago).

I also noticed that querying for 1m or 1d kline doesn’t change this, we can’t go back more using a bigger timeframe.

My question is, is this correct correct and do you have some officially defined limits about this ?

Regards,