A simple fix is to make mob_spawner 2 and mob_spawner 0 have the same texture
It is like this in 1.7.9
I updated, and it fixed 50% of natural and 0% of custom spawners. The rest are still bugged.
Will redownload jar and see if spawner is still glitched
Screenshot and crash report
No resource pack installed,
/give @p mob_spawner gives glitched texture
I can upload a screenshot later today.
This happened to me, similar scenario. AMD R5 230 graphics card. Cannot reproduce on a Nvidia Titan X; even on the same world.
Leads me to believe that this is a graphics card issue.