Can't connect my iPhone with APP but my two iPad can do

Hi,
I configure my network for use only one url to access my HA from outside and inside. All my connect is Ok from iPad or from browser. I can use browser to with my iPhone but no from ios App. My app work fine with iPad ios too. I use DNSMASQ for use inside URL. All ios device use same config for network. Also my IOS iPhone can connect from outside, but never inside.

Any help appreciate.