Checklist

• I've looked at the documentation to make sure the behavior isn't documented and expected.
• I'm sure this is an issue with Leaflet, not with my app or other dependencies (Angular, Cordova, React, etc.).
• I've searched through the current issues to make sure this hasn't been reported yet.
• I agree to follow the Code of Conduct that this project adheres to.

Steps to reproduce

I'm using a very basic OSM tile layer. I'm using a 4k monitor with scaling on macOS 15.5, chrome 136.0.7103.93.

Expected behavior

No lines between the tiles

Current behavior

Lines are showing between the tiles of the tile layer. See screenshot. This was not present in Leaflet v1.9.x. When panning around sometimes the lines do not show. Looking at the translations on the tile img elements, there don't seem to be noticeable gaps in the numbers.

Minimal example reproducing the issue

No response

Environment

• Leaflet version: v2.0.0-Alpha
• Browser (with version): chrome 136.0.7103.93
• OS/Platform (with version): macOS 15.5, M1 Max (arm64)