get_historical_klines() takes forever and gives no output

[DSDecay]

Out of the blue, get_historical_kline() seems to stop working properly:

from binance.client import Client

def get_earliest_kline(client, symbol):
start_str = 1210685792000
try:
klines = client.get_historical_klines(symbol, Client.KLINE_INTERVAL_1MINUTE, start_str)
if klines:
print("Data retrieved:", klines)
return klines[0]
else:
print("No data received for the request.")
except Exception as e:
print(f"An error occurred: {e}")
return None

earliest_kline = get_earliest_kline(client, "ETHBTC")
if earliest_kline:
print(f"Earliest kline timestamp for ETHBTC: {datetime.fromtimestamp(earliest_kline[0] / 1000)}")
else:
print("No klines found for ETHBTC since 1 Jan, 2008.")

It should have returned first available kline, due to too early startTime (which was very much intentional), but it returns nothing. It does not throw any exceptions, but instantly sends requests.

OUTPUT:
DEBUG:urllib3.connectionpool:https://api.binance.com:443 "GET /api/v3/klines?interval=1m&limit=1&startTime=1500004920000&symbol=ETHBTC HTTP/1.1" 200 141
DEBUG:urllib3.connectionpool:https://api.binance.com:443 "GET /api/v3/klines?interval=1m&limit=1&startTime=1500004980000&symbol=ETHBTC HTTP/1.1" 200 141
...infinite requests of the same type...
. . .

Meanwhile, using requests works as expected:

import requests
url = "https://api.binance.com/api/v3/klines"
params = {
'symbol': 'ETHBTC',
'interval': '1m',
'startTime': 1210685792000,
'limit': 1
}
response = requests.get(url, params=params)
print(response.json())

OUTPUT:
[[1500004800000, '0.08000000', '0.08000000', '0.08000000', '0.08000000', '0.04300000', 1500004859999, '0.00344000', 1, '0.00000000', '0.00000000', '0']]

I tested it in several environments and it's always the same behaviour, as described above. More over, few days ago get_historical_klines() worked and I used it to populate database with timestamps of earlies klines per symbol.

Does someone know something? Maybe Binance changed something on its side?