Suno training on unpublished Udio tracks?

I recently had a WTF moment while playing with Suno. I had written lyrics that I previously used to create a song on Udio in summer 2025. The lyrics were a reworking of a poem I'd written many years ago -- no parts generated, nor even polished by AI, just my own words.

Just before Udio caved last fall, I had returned to the song because I decided I needed to revise the lyrics in a short section of the bridge, changing "like beach foam before the hurricane" to "like fluff from coyote brush before the storm" (the first version is probably lyrically better, but I had my reasons...)

I never published this song on Udio in either the original or the revised versions (and I wasn't able to grab a wav download of the revised version before Udio locked things down), nor did I post it anywhere. And -- as far as I know -- the three friends with whom I shared a downloaded copy of the first version never posted it anywhere, either.

So a couple of weeks ago, I uploaded my revised lyrics to Suno just to see what it might do with it, using the same prompt I'd used on Udio, then had Suno generate 6 versions. When I listened, I first noticed that all 6 dropped a couple of lines in the second verse, which seemed odd, but it's not the first time I've had something similar happen (though usually not so consistently through multiple versions. Listening further into the different versions, I discovered, however, that it had also just as consistently used my original, unrevised lyrics instead of the revised lyrics I'd just input!

A not-so-subtle reminder that my online privacy is an illusion? And that anything I do online may -- and likely will -- be used in unexpected ways? I'm suddenly feeling way more wary of Suno (and maybe of AI in general...)

Has anyone else had a similar experience?