Ah yes. Thank you! I'm conflating forum posts after surfing a bunch related to same thing. The tables, filepath, field names all check out. Haven't changed anything from raw SSURGO tables, no hidden spaces, and the table that successfully joined using join field tool is in exact same location/gDB/filepath as the table that would not join successfully to the target table... Standard Join tool works from right click menu. Join Field tool through toolbox does not... I can't think of anything else that points to anything other than the tool itself? Though I am new. Any ideas if it's not the filepath/fieldnames etc?
I also did have a glitch earlier in the same process where I had to start again with raw data because the Join Field tool resulted in large amounts of blank (not Null but truly blank) cells that I knew should have data in them post-Join. At the time, I assumed it was me, but after ongoing issues and seeing this thread, I'm starting to think it may be more than just user-error... Thanks in advance for any possible help!