Oh, the SE-wide search is funky wrt. case sensitivity:
url:"SpeedTestNet.io"
(1 result) vs
url:SpeedTestNet.io
(3 results, which
don't include the 1 result for
url:"SpeedTestNet.io"
. Note: all of these are deleted now, so you can't duplicate this, but I was seeing the issue before any of them were deleted.