Labels are not displayed when setting a default text

In certain conditions, I have pre-filled fields with something similar to my_field.setText(my_text). But when doing so, the label is not pushed at the top like when writing in an empty field.

PS: manually deleting pre-filled content to add it back works.

[dkdilipkumar]

please resolve this issue, hint colour change to White that's why it is not showing.