I don't think neither it's server related. This would be weird.
Also I noticed some random event on one province (Bandar Kadek : 77) :
Quote:
A master thief has stolen many of your magic gems.
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The province is not really mine : TC owns the castle, I was just passing through the province, Abysia conquered it just after my armies left it. Anyway, there is no lab in the province allowing access to my gem stock. The commanders I had in that province didn't owned any gem.
Hence, it may be a bug related to this random event. Did you guys had that kind of event this turn ?