I have the latest update for GD (1.2.1.5) and now here is 1.2.1.5a and no info abouit it from anyone, not even Crate enertanment, or GoG. What gives, and why the suprise update that's not listed.

Duh.

https://forums.crateentertainment.com/t/grim-dawn-version-v1-2-1-3-hotfixes/142410

Thanks, but I already know about that and updated the game as soon as I saw it.

The update was posted on Jan 31. I updated on Feb 4, and now there is another update a few days later adding an "a" to 1.2.1.5 hence my confusion. :)