Professor Simon Holland stated recently that Seti@home did find a signal back in 1999. What is his statements referring to exactly? Did we find something but it wasn't shared? Any more confirmation since?

Professor Simon Holland stated recently that Seti@home did find a signal back in 1999. What is his statements referring to exactly? Did we find something but it wasn't shared? Any more confirmation since?

I think Prof Holland refered to the BLC1 signal received by the Breakthrough Listen SETI project in 2019.

https://en.wikipedia.org/wiki/BLC1

On 25 October 2021, researchers published two studies concluding that the signal is unlikely to be a technosignature due to its similarity to previously detected terrestrial interference.

The BOINC Synergy SETI@home screensaver is featured in this inaccurate conspiracy theory video involving SETI@home.
Part 1:
https://youtu.be/-FSkiLqLx60

Part 2:
https://youtu.be/WUTDRvnv0VY

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I confused 1999 with the Wow! signal, but also thought a gaussian should be narrowband but perhaps wrong.

Edit: I am more concerned about witness description (or testimony) because it is that we should prove.

The best explanation (in layman's terms) of the seti@home science they ever wrote:

https://seticlassic.ssl.berkeley.edu/about_seti/about_seti_at_home_4.html

and:

https://setiathome.berkeley.edu/sah_glossary/gaussians.php

...and Kudos to the people at Berkeley who respect Tim Berners-Lee's wisdom: Cool URIs don't change.