iPhones do this when low on storage
really? I searched, but I couldn’t find any instances where this had ever occurred. This appears to have been altered.
buy more storage fam and everything will be fine…or try resetting your phone 
Try adding some iCloud storage to make sure you have sufficient memory space that can be good for your hone…or even better try updating to the latest Operating system.
You might be using a beta version of the software making it unstable and causing your applications to crash
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Thats absolutely correct @JanetJay …Using the latest IOS version is always the best way to go.
Am currently on IOS 15 let me try getting to the latest OS and see if the problem persists…
Use this tool @ReedRichards it will be of best help…It has helped me in the past in matters like this.
Just a low storage problem is all I can think of