Cannot Edit or Select Drawings

A problem has come up while animating: In one of my layers, I cannot select or edit my drawings. Whenever I make a new stroke, it has a bluish outline, and only the new stroke can be edited. I have no clue what I did to cause this issue, but I am very confused and not sure how I can color my otherwise complete animation without having to redo quite a few drawings.

Apparently closing and then re-opening the program fixed it.

Everything is now hunkey-dorey in the world of Hugh Neutron, sorry for wasting anyone’s time.