The new Raging affix is available for testing on the Patch 10.1 PTR and as players have guessed, it also prevents players from interrupting while it is active.
New Raging Affix in Patch 10.1
The new Raging affix in Patch 10.1 reads as follows:
Immune to interrupts and crowd control effects.
This buff only lasts for 20 seconds now and can still be Soothed.
No Interrupts
As you can see in the video below, the Healing Balm spell shows as Protected and the interrupt doesn’t kick it.