Hey there Iphoneuser1124,
It sounds like you're experiencing performance issues with your iPhone, which could be due to low storage. Let's have you ensure your iPhone has at least 1GB of free storage to allow the storage drive to operate smoothly. Check out that suggestion here:
If your iPhone or iPad is running slow - Apple Support
You can check your device's storage in Settings > General > [Device] Storage. For best performance, try to maintain at least 1GB of free space. If your available storage is consistently less than 1GB, your device might slow down as iOS or iPadOS repeatedly makes room for more content.
If you need to free up some space, follow these steps to turn on the storage-saving recommendations built in to iOS or iPadOS:
1. Go to Settings > General > [Device] Storage and read the recommendations that iOS or iPadOS might provide.
2. Tap Enable to turn on a recommendation, or tap a recommendation title to review the content that you can delete.
If the behavior continues, let us know if the issue persists when using a different network. This may help narrow down the issue. For example, if this occurs when using cellular data, test the behavior when using a Wi-Fi network.
Kind regards.