Hello there 9Fez,
Thanks for participating in the Apple Support Communities.
If you have an app enabled to refresh and check for updates in the background, this could be expected to occur. If you'd like to adjust this setting, check out the information below which can be found here: Switch apps on your iPhone, iPad, or iPod touch - Apple Support
Use Background App Refresh
After you switch to a different app, some apps run for a short period of time before they're set to a suspended state. Apps that are in a suspended state aren’t actively in use, open, or taking up system resources. With Background App Refresh, suspended apps can check for updates and new content.
If you want suspended apps to check for new content, go to Settings > General > Background App Refresh and turn on Background App Refresh. If you quit an app from the app switcher, it might not be able to run or check for new content before you open it again.
We hope that's able to help.
Have a great day!