Tiled stops reloading images when editing them via Photoshop

[pkmnfrk]

Tiled Version: 2018.09.12
Platform: Windows 10 64bit
Photoshop version: CC 2018 (19.1.4)

Problem:

Tiled sometimes fails to reload a modified image. Usually (potentially always), this is when said image is being edited in Photoshop.

Steps to reproduce:

1. Assume a tileset referencing image.png, open in Tiled
2. Open image.png in Photoshop
3. Make a change, and save image.png (just using the normal Save, not Export)
4. Observe Tiled, it will have reloaded
5. Make another change, and save again

Expected:

Tiled reloads the image

Actual:

Tiled no longer reloads the image, even when editing them with other programs (eg, Paint). Requires a restart of Tiled to start reloading again

Note:

Windows Explorer notices the changes every time. Editing with other applications than Photoshop does not trigger this behaviour (ie, it reloads every time)

Baseless conjecture:

Perhaps something that Photoshop is doing during a Save confuses Tiled, and causes it to go into a state where the reloading never finishes and therefore doesn't try and reload in the future?

[bjorn]

Thanks for the detailed bug report! However, I'll close it since it is a duplicate of issue #44.

I had hoped this issue would be resolved by change 2358419, but it failed to address the issue. :-(