In this case, it is possible that your internet connection is unstable.
cTrader trading platform needs to send and receive data every moment in order to run accurately.
If there is a moment where the platform doesn’t get any data due to unstable internet connection, price charts on the platform stops updating and there will be a time lag between the new market price and the shown price on the chart.
This can lead to “Slippage” and “Re-quotes” against your orders.
To resolve this issue, you simply need to find a better and stable connection to run the platform.