Overlay Dialog is invisible

[development0264]

Describe the bug
I'm using overlay dialog just like Truecaller, and it's invisble some time like it's opening and showing notification as well but it's just invisible and transaparent

To Reproduce
Just use it like TrueCaller; on an outgoing or incoming call, I'm showing an overlay dialog without opening the app. So it's working if I open app and it again started working, but if I use it for a long time without opening app, then it's just invisible

Expected behavior
It should work even without opening app for loner time.

Versions (please complete the following information):

• system_alert_window: ^2.0.0
• Device: [e.g. Samsaung S22, or any other]