Hi,

pancors can bypass the shields of all their victims.
Except Devourers. A pancor attacks always a devourers shield before attacking his armor.

Battle report: https://xcraft.net/battle/index.php?battle_id=f554d747092b5a71c4cacdd897aba11a

Edit: I need to correct my report.
New report is: Pancors do not bypass shields of ANY XERJ UNIT. (see battle report above)
BUT: They bypass any shields of any units of OTHER RACES than Xerjs. (see battle report below)

Battle report: https://xcraft.net/battle/index.php?battle_id=efdc7cac9f52c5470c387616e58d570f

Edit 2: To give a complete overview here a battle report where they also bypass the shields of TOSS.

Battle report: https://xcraft.net/battle/index.php?battle_id=bc334b32377ec3a5798c094689d3ab58

I now think that XERJ units can not bypass shields of other Xerj units but bypass the shields of all other races.
They should bypass XERJ shields aswell.

All armor (shields) of Xerjs are immune to the attacks through the shield.
It is not a bug.