Hello, sadham20ten.

Thank you for using Apple Support Communities.

From your post, it's understood you're having troubles with the Files app. We'd be glad to help out. When this happens, are you currently uploading anything or making changes to documents? Does it seem to be anything specific when it occurs?

Try seeing if the same issue occurs on either another Wi-Fi network, or switch to cellular service on the iPhone. This could help rule out any network issues.

Make sure both devices are up to date and restart them if you haven't done so already:

Update your iPhone, iPad, or iPod touch

Restart your iPhone

Restart your iPad

Keep us updated.

Cheers!