Facebook Search bar Text on an I-Pad

[agh55]

Hi, Hopefully someone has come across this issue and can advise how to fix. Within the last couple of days the text colour on the Search Bar in Facebook has changed to white. This is happening on 2 of our I-Pads but is ok on our i-Phones. The iPad is at version 14.6. I have also deleted Facebook and reinstalled it, problem still exists.