Strange grid in results when using film grain

Whenever I use the film grain tool (imported and exported pictures are TIFFs), there are some strange raster grids, especially noticeable in the midtones. I've only tested this on macOS with both Chrome and Safari, I cannot say whether this problems exists in any another browsers/OSes. ### Expected Behaviour Wonderful film natural film grain in image, without any regular patterns. ### Reproduction Steps 1. Import image 2. Apply film grain 3. Export image ### Device Type [x] Desktop [] Mobile [] Tablet ### Browser [x] Chrome / Chromium [] Firefox [x] Safari [] Edge ### Operating System [x] MacOS [] Windows [] Linux [] iOS [] Android