[bug]It doesn't work correctly when the tileset has space and padding.

[HowQi]

Once I used this asset to make a demo scene temporarily. In order to make the 18x18 tiles fit into my 16x16-tilemap project, I added space and padding to it.

After importing into Godot, it is disordered, as shown in the next figures.

I tried to fix this problem in my project. At first, I thought it was just the wrong setting of space and padding, but after I fixed that, I found that the situation was not so simple.

As shown in the figure, after trying to repair it, I found that some rows and columns were missing in the middle(such as the next figure), and some blocks could not find their pictures at all.

I will upload relevant project for reference.

TestForAddon1_before_try_fix.zip
TestForAddon1_after_try_fix.zip