some apps UI issues like whatsapp

i am using iphone SE, i updated the letest version of os 12.1

i found the ui issues in 2apps Whatsapp and alibaba those app are tab page application

i am using the apps i found mager ui change in tab icons in both apps

i contact to whatsapp they said its os issues

Whatsapp say:

We apologize for the inconvenience, but this is an issue related to the iOS and not WhatsApp itself. Please try to reboot your phone (turn it off, wait 30 seconds and turn it back on). If the issue persists, unfortunately, there is nothing we can do from our end to fix a problem with the iOS.

Here the Ui issues in wahtsapp