I've seen a YouTube video showing several cases where some mods or abilities indicate "combatants" but work both in PVP and PVE, basically in each case it needs testing.
I would assume it is intended, just description is misleading.
English
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[url=https://twitter.com/mercules904/status/1333865507326455811?lang=en][/url] - this is a link to Twitter for a discussion about similar issues with weapon perks. Apparently also "Frostpulse" (warlock aspect) says that is you activate rift it will release a wave freezing combatants, but works on guardians too, even though doesn't mention them