How to prevent grid lines in tilemap after resizing window?

Help
,
1

Godot Version

4.2.1

Question

I am using a 2d tilemap set to isometric with a grid size of 156x90. When using my base viewport size of 1920x2080, there are no lines between the tiles.

image
image1227×736 3.06 KB

However when I resize the window, gaps in the tileset appear.
image
image1211×710 19.2 KB

Are there any display settings I can change to fix this?

My stretch settings are:
mode = canvas items
aspect = expand
scale = 1
scale mode = fractional

2

I tried using Snap 2D Transform to Pixel and Snap 2D Verticies to Pixel, but sadly neither of them seemed to fix the issue.