Need to stop traffic to go from WCDMA to LTE

One of our customers reports that when the module goes from WCDMA to LTE coverage he has to stop traffic to return to LTE technology. If the traffic through the cellular connection is not stopped, the module remains in WCDMA even if there is LTE coverage available. Is this a normal behaviour? A test with a cellular module works fine without the need to stop traffic.

Hi, this is a normal behaviour. This is how LTE reselection mechanism works