Resolution oscillating issue

As title, I'm strongly suspecting that the pause system
cause the resolution oscillating issue appear again.

Here is my explain, I'm playing with low resolution scaling by dynamic resolution. when I press esc to pause, the resolution just jump back to higher version and after few second it scales back.

The point is, it seems when my screen freeze because my pc cannot suffer the content, the game will automatically pause to save my xp.

It's good, but it also higher the resolution and gives my pc more pressure and cause next freeze and again and again.

Could we just have a stable low resolution option to play a smoother game?