The wierd behaviour is foremost in the behaviour of the mouse button.
eg. Right MouseButton pan is swapped with left MouseButton Zoom.
In the Hirachy Tree selecting an item is adding an item to the selection, like using the shift key.
I have to deselect items to have a single selction...
For that reason I'm not sure if it is only the mouse.

I've not seen anything like this in any other program.
And it is not always happenig.

But I have to close and open Spine every 5 minutes....

Nothing to hide in the log:

Spine Launcher 3.8.82
Esoteric Software LLC (C) 2013-2020 | http://esotericsoftware.com
Mac OS X x86_64 10.14.5
Up to date: Spine 3.8.84
Spine 3.8.84 Professional
Licensed to: *****, *****
ATI Technologies Inc., AMD Radeon Pro Vega 20 OpenGL Engine, 2.1 ATI-2.9.26
Started.
OpenAL 1.1, Default audio device
Automatic backup complete.

Hi, could you please check that Path Constraint are working in Starling. When I compile the Spine Starling examples, the chains of the Tank are not moving. I came across this in my current project. It seems like the Position of the Path Constraint is ignored. I'm in the middle of a project. Please have a look at this. Thanks.
spine-runtimes-3.8 & Starling 2.6

I'm on MacOS Mojave. Nothing special.
The Bug is in the behavior of the left and right mouse click. At least here.

1. open Spine everything works as expected.
2. change to another programm ( do some clicking.. ).
3. coming back to Spine. Mouse click in the UI is altered, wierd not usable.
4. only a restart of Spine brings back the normal behaviour.

Well but I need to be able to do things in other programms....

Hi badlogic, thanks for coming to this issue.
Attached is a project that demonstrates the behaviour: https://www.dropbox.com/s/jef18hpkcnytdmf/Test-Spine-TP-Rotation.zip?dl=0
The assets of the Spine anmimaton have been packed by TexturePacker with "allow rotation" selcted. The Spine/Starling render is faulty. Screenshot in the zip.
Everything is loaded through the Starling AssetManager.
My current project is full of animations + graphics and I loose a lot of file and GPU space without the ability to rotate assets.
A solution would be great, thanks.

Unfortunatly, this issue seems to be still around.
Switching "allow rotation" on in Texture Packer will distroy the rendering in Spine.
Any Idea?

Anybody is capeable of wirting a sub class of AttachmentLoader: StarlingAssetManagerLoader
I often have a mixture of quite a few assets. Some animation assets some other. Also they distibute over a few texture atlases.
Of course that class would also compensate for the scaling of the textures.

var json:SkeletonJson = new SkeletonJson(new StarlingAssetManagerLoader(myAssetManager));

Would that be possible?