Paint foaming problem. Why does paint foaming occur?

[diydaddy51]

Is there any way I can manage this problem? What should I do? Thanks for your time and I look forward to your response.

 

[JohnD]

you're using a roller, aren't you?

 

[diydaddy51]

you're using a roller, aren't you?

yeah. Not the roller's fault though, but the user. Lol.

 

[JohnD]

Roll it slower.

Are you putting emulsion on a wall?

How long did you stir the tub?