Repeats the last two coins

[Travid]

I tried the settings.env that's in the docs:
SYMBOLS=btc,eth,ltc,xrp
API=coingecko
But the last two coins repeat at the end.
Example it displays: btc,eth,ltc,xrp,ltc,xrp,btc,eth,ltc,xrp,ltc,xrp,btc...
Here's the output from the docker-compose logs ticker

Attaching to crypto-ticker_ticker_1
ticker_1  | 2021-08-25 02:27:22,903 - urllib3.connectionpool - DEBUG - Starting new HTTPS connection (1): api.coingecko.com:443
ticker_1  | 2021-08-25 02:27:23,033 - urllib3.connectionpool - DEBUG - https://api.coingecko.com:443 "GET /api/v3/coins/list HTTP/1.1" 200 None
ticker_1  | Press CTRL-C to stops
ticker_1  | 2021-08-25 02:27:23,180 - root - INFO - `fetch_price_data` called.
ticker_1  | 2021-08-25 02:27:23,181 - root - INFO - Fetching data for {'binance-peg-litecoin': 'ltc', 'binance-peg-xrp': 'xrp', 'bitcoin': 'btc', 'ethereum': 'eth', 'litecoin': 'ltc', 'ripple': 'xrp'}.
ticker_1  | 2021-08-25 02:27:23,190 - urllib3.connectionpool - DEBUG - Starting new HTTPS connection (1): api.coingecko.com:443
ticker_1  | 2021-08-25 02:27:23,483 - urllib3.connectionpool - DEBUG - https://api.coingecko.com:443 "GET /api/v3/simple/price?ids=binance-peg-litecoin%2Cbinance-peg-xrp%2Cbitcoin%2Cethereum%2Clitecoin%2Cripple&vs_currencies=usd&include_24hr_change=true HTTP/1.1" 200 None
ticker_1  | 2021-08-25 02:27:23,488 - root - INFO - {'bitcoin': {'usd': 48266, 'usd_24h_change': -1.7454856188742776}, 'ethereum': {'usd': 3209.18, 'usd_24h_change': -2.8238832845209756}, 'ripple': {'usd': 1.16, 'usd_24h_change': -5.254621955507383}, 'litecoin': {'usd': 176.55, 'usd_24h_change': -4.171894133286854}, 'binance-peg-xrp': {'usd': 1.16, 'usd_24h_change': -5.122487792867482}, 'binance-peg-litecoin': {'usd': 175.87, 'usd_24h_change': -4.367825788312539}}
ticker_1  | 2021-08-25 02:27:23,489 - root - INFO - Using cached price data.
ticker_1  | 2021-08-25 02:27:26,689 - root - INFO - Using cached price data.