Unity2D Grid disappears when zooming out

When I work on my scene in scene view, I do not see a grid even though it's enabled. Only when I zoom in very closely, I can see the grid. My reference resolution is 1350*2400 and I'm mainly working on UI in this scene.

Changing the grid size does not help. For clarification, please see the screenshots attached:

Grid visible (vertical line): Grid not visible (zoomed out a bit)