Hello Zakaria482,
Let's see if this info helps out:
"Clear website data
You can clear website data occasionally to improve Safari performance. If you still need help, follow these steps:
- Go to Settings > Safari.
- Tap Clear History and Website data.
- Tap Clear History and Data to confirm."
This is found in If Safari displays a blank page or quits on your iPhone, iPad, or iPod touch. This should help to resolve your issue.
If it doesn't help, you'd want to narrow down the content itself. Questions to ask would be " Is this happening on all websites or only a few?" and "Can I reproduce this on other browsers or does it only remain on Safari?" By narrowing this down, you can see whether it's related to the website or a restriction on your iPhone.
Let us know how this works out.
Take care