It happened on a few words one after another..
on this particular PC..

But I've always got far too many tabs open in chrome
at any one time..

So maybe it's an invading force of tracking cookies taking control...???

I'm more than 90% certain The PC is free of malware..

If I had time and inclination, I'd maybe need to do a controlled test
of the the same bunch of words
using google search on different devices...