Starting 18th December, this error began causing error alerts.
In 1.46.0-wmf.7 88,707 417,782 errors and counting and 1.46.0-wmf.5 only 49.
https://logstash.wikimedia.org/goto/7e9df7b804458543177feac91917c6d9
Not much information but this stack trace and impacting all skins:
```
at ve.ce.SelectionManager.updateDeactivatedSelection https://uk.wikipedia.org/w/load.php?lang=uk&modules=ext.visualEditor.base%2Ccore%2CeditCheck%2Cmwtransclusion&skin=vector-2022&version=1lboe:667:408
at https://uk.wikipedia.org/w/load.php?lang=uk&modules=ext.visualEditor.base%2Ccore%2CeditCheck%2Cmwtransclusion&skin=vector-2022&version=1lboe:723:811
```
Based on volume per users seems like it occurs more than once on a single page view. Haven't tried replicating yet.
**Steps to replicate the issue** (include links if applicable):
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**What happens?**:
**What should have happened instead?**:
**Software version** (on `Special:Version` page; skip for WMF-hosted wikis like Wikipedia):
**Other information** (browser name/version, screenshots, etc.):