Hi,
I have created a Survey123 form that contains several fields with the appearance type of 'numbers'. When one of these fields are selected in the app it is causing the screen to flicker a few times. Data can be added to the field and the rest of the form functions as expected but there appears to be a potential bug causing this to happen. This has been replicated by different users on different devices.
I also re-opened a previous form that was created that contained a numbers field and found the same behaviour (even though I'm sure this wasn't the case when this form was originally created).
If this could be looked into, I would be really grateful.
It would be helpful if you contacted Esri Tech Support and logged a case with them. They will want information on the devices you are using (i.e., make/model).
Personally, I have forms with the numbers appearance, and have not noticed this yet on iOS. Are you using Android?