Hello Callun, (I am sorry for my english, I only speak french. Thanks to Google for the translating from french to english.)
I thank you for your interest in my message and the promptness of your response.
As you suggested, I reset Affinity Designer with CTRL. This did not change the problem.
So I did some tests with the hope to isolate the problem. I combined Affinity Photo, Affinity Designer and two computers.
Here's what I observe.
1. The phenomenon occurs on only one computer.
2. It occurs with Affinity Photo as well as with Affinity Designer.
3. It occurs with every files.
4. The trigger seems a simple click.
5. Pass simply from Affinity to Mail and return to Affinity is enough to provoke him.
6. The saved files are not affected by the phenomenon.
7. On 20 August , I downloaded the version 1.3.5 of Designer and Photo. The phenomenon is still there.
The computer on which the phenomenon occurs is a eMac 27-inch under MAC 0S 10.8.5 in French.
The computer where everything works perfectly is a eMac 27-inch under Mac 0S 10.10.5 (YOSEMITE) in French.
Attached you will find two simple files in case you would like to examine them. But, in my opinion, the problem is not in the files.
Thanking you in advance,
Daniel VUYE
eyes.afdesign
fish.afdesign