Yes perhaps a bit of grease in the die for the L in LIBERTY. For the rev, as this is opposite the lower part of Abe's bust, the metal seems to flow into that part of the design often leaving a little less to fill out the letters in the inscription. We see this phenomenon quite a bit.
"If you climb a good tree, you get a push." -----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz