App gets closed when screen gets locked.

[MAB]

After Pie Update, whenever I use a particular app, if I lock the screen the app gets closed automatically, when I unlock the screen I lost all the progress and app is no more on screen (foreground) . It is very irritating any help will be appreciated. 

[BlackShark]

Check in developer options, if this options are enabled

[MAB]

Which option bro, the image is all black.

[BlackShark]

Previous image is not loading, i dont know why. I meaned go to Developer options, check there if "do not keep activities", "limit background proccess" these options are enabled then disable it

[MAB]

Do not keep activities is disabled by default and limit background process is set to standard limit.

[MAB]

I think this is not the reason for the problem

[BlackShark]

Oh, may be 😢