After returning back east (having killed everything back west, including the Zigur) the orc patrols show up as orcs on the world map, but when you enter the combat they are actually the zigur patrols, and thus way easier.
Seems to affect all of them, met and destroyed 5+ such patrols.
Edit: Exiting game and relaunching corrects the issue, so it isn't stored into the savegame.
[1.2.3] Orc Patrols are Ziguranth Patrols
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