unable to send survey, logged out of app

[KevinArmstrong1]

I am running v1.10.23 on iPhone 5. I am signed in to my AGOL account and fill out a survey. Once I go to submit, i receive an error (Code 498 - Invalid token). I go to my main page in Survey123 and can see that I am still signed in. I am unable to send until i sign out then sign in again. Is there a timeout that is occurring? I am pushing data to a hosted service in ArcGIS Online. 

[JamesTedrick]

Hi Kevin,

Survey123 caches your login information so that it can be preserved when you go offline; it may be that while it appears you're signed in, the login token expired and was not renewed.  Did this happen after a period of time either disconnected or not using the application?

[KevinArmstrong1]

Yes, this happens after about 15min or so. The strange thing is it does not happen on my Android (Samsung Galaxy S6). I had the app closed overnight and I was still able to enter new data the next day using my Android phone.