Hi.  There seems to be a gap in the iOS and iPadOS offering.  The update that was completed for the Salesforce Mobile App to force users into the application given certain URLs types does not always play well with the LEX for iPad Experience.  Randomly we will get thrown from the iPad experience to the mobile app.  Or if we have another application try to launch the URL, it goes to the mobile app instead of staying in Safari.  

https://help.salesforce.com/articleView?id=salesforce_app_universal_links.htm&type=5