Pagos - no exp when mobs killed/chain not registering kills

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Date & Time:14/8/2108
Frequency: intermittent over the past 30 minutes, happened several times 12 hours ago too
World name: Omega
Character name: Rivers Balduran
Monster name: Pagos Billygoats, Huwasi
Class/Level: MCH, elvl 28
Party or solo: party
In-game time: 2.10pm
Area and coordinates: level 33 Pagos Billygoats and lvl 31 Huwasi

If you have an AST then tell them not to use earthly star. You will not get exp when it kills the mob. The skill does not register as a party member.