My iPhone has updated the 3CX app to the latest version and all of my staff using iPhones are having the same issue since the upgrade. When we are in our office connected to Wifi, the keypad screen cannot connect to the 3CX server and flips between "Ready for Calls" and "Connecting". If we turn Wifi off and use our LTE connection, the issue goes away. If we reconnect Wifi after a successful connection to the LTE network, the Wifi connection issue will not return as long as the phone doesn't lock itself. If the screen locks, the issue will return when it is unlocked and the 3CX app is opened. There are no issues when using our home Wifi networks...just our office so we believe the issue lies with our network settings within the office, but our IT firm is having trouble isolating the issue so I'm hoping someone here might be able to provide assistance on where to start looking for the problem.
3CX app version for iOS: 16.1.1.323
iPhone iOS: 13.5.1
PBX: 16.0.619
Any assistance would be greatly appreciated, and let me know if there is any further information required. Thanks in advance!!