I had to check a few times to confirm i wasn't going insane, but i checked and Solaris discovery is locked after crucible science, which is only unlocked way later on in the game in like, Bettlejuice.

also noticed some planet researches don't take the science pack of the previous system like Moshine and Morrundum. Cerys takes crucible science as well for some reason its odd, idk if that's because of my particular cook up of mods (mostly what i had before the update [do note this is a different gameplay so its from the start of the game that i am checking these] which most of what the pack had as needed and optional and a few other mods i enjoy that shouldn't break progress like this.

I had the same issue and it seems this could be the solution:

Go to Settings -> Mod Settings on the Startup tab, in the section Planet Crucible set Include post-Crucible changes to Research productivity only.

I also noticed that Corrundum was not integrated in the tech tree progression properly until I changed this:

In Settings -> Mod Settings on the Startup tab, in the section Corrundum unckeck the checkbox for Require Vulcanus before Corrundum.

That did fix the crucible issue which was a big one, the corrundum just made the the planet not require the vulcanus tech card the rest is unchanged