My iPhone won’t let me log into Snapchat

Hello, i have a problem with my snapchat account is that everytime i try logging in from this specific phone, my account gets automatically locked but if i try logging in from any other device, like my old iphone for example, it works perfectly fine so what is the problem with my phone? Why won’t it let me log into snapchat? And im sure that i didnt install any third party apps or anything else.