Some pages render well, others are blank on android device but works on ionic serve


I’m new with Ionic / cordova so it’s probably my fault but i don’t arrive to resolve my problem. For my app, I use a login page found on internet, it’s working well on ionic serve and on my phone but when i log in to go in a page i created it only shows the title.

here’s the code of the page not working on my device :

And what it looks like on ionic serve :

if you need any precisions just let me know !