Can't place blocks underneath me

Tried in both Hardcore mode & in Single Player Game - Creative Mode:

Cannot jump and place blocks underneath me. Tried with multiple materials, it doesn't seem like I can jump high enough to make room for the block I am trying to place. Issue only occurred after my computer updated to Windows 8.1 earlier this evening. Blocks will place if I am in creative mode and fly a few blocks higher to place some below me.