update_post_meta broke url value

I’m having a problem, i have a post meta key, its value is a url like https:// .. like this

but now if I pass the value to update_post_meta

its saves it as "p"

I check the wordpress codex docs about update_post_meta and it says

Character Escaping
Post meta values are passed through the stripslashes() function upon being stored, so you will need to be careful when passing in values (such as JSON) that might include escaped characters.

could that be a problem?

please help 🙂