rapid void
As you can see in the image i've maxed Hollow Bones (Huesos Huecos in Spanish) to max level but it still appears with the perimeter blue blinking as if it was possible to upgrade more.
Also in the upgrading file is note 1, referring to Huesos Huecos, but as it is maxed, it can't be upgraded.
I've maxed other items, like Accelerate Growing (Crecimiento Acelerado) for Argentinosaurus. It's also blue blinking but it does not appear as pending. So the blue blinking is not the problem.
To get the "1" pending item in pending files you need to have 500.000 mutagens. While you don't have them, it does not appear as pending.
stiff sage
what game version are you using?
rapid void
36_13