Ever since the last update, Visual Studio sometimes highlights some code I type in yellow. See the attached screenshot.

Any idea what this is?

I can’t really reproduce it, it happens only sometimes, let’s say once a day. The highlight goes away when I hit the escape key, not sure if anything else makes it go away too because it happens so rarely and I wasn’t paying too much attention until now.

Current version of my VS is 17.12.3, community edition.

Update:

It’s not a search result. This is how searching inside a document looks like:

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Update 2:

Search results look different when you deselect them, but still different from the weird yellow highlight.