Weapon Swap registering as damage

When there is a discrepancy between total energy shield between your two weapon sets, the difference is registering as damage when you swap between them. This quickly chews though stacked grim feast and refills at the rate of your energy shield recharge. This happened once to my character prior to the patch, now it appears to be permanent.

Should read: this happened to my character at least once prior to the patch, but resolved itself. This now appears to be permanent.