Whenever you equip any headwear, the script will look if there are currently any effects configured for this item and apply them. As kai said, you can also always reconfigure them.
So maybe you enabled some features for the glasses earlier (for testing) and forgot about it? If you didn't then it's simply a bug and I'll have to see if I can reproduce and fix it.
Thanks for the reply.
Yes, its not a major issue to reconfigure, but I'm quite sure I never had any configuration for those glasses. In fact I only found them shortly before I noticed the issue.
After I reconfigured the changes took hold, and I haven't been able to reproduce the issue since then.
So I guess if nobody else has reported this problem, then it must have been just a weird random anomoly.
:confused: