Reading of compute buffer stops after a few seconds (only on OpenGL API)

[davidAlgis]

https://unity3d.atlassian.net/servicedesk/customer/portal/2/user/login?destination=portal%2F2%2FIN-25859

[davidAlgis]

Unity has made an issue of it : https://issuetracker.unity3d.com/issues/compute-buffer-isnt-updated-after-a-few-seconds-when-computebuffer-dot-getdata-is-not-used

[davidAlgis]

The problem does not seem to appear with DX11 API like on e3472ee