In tactical combat, I noticed that a tile occupied by my starting spear unit could not be re-occupied after it had moved off the tile or died. It was a regular grass tile that should have been allowed movement. I could not even highlight the tile with the pointer (all other passable tiles would highlight). I've had it happen with the starting militia unit also, but only once. Not sure what's causing it.

I was moving a pioneer unit to establish an outpost and the auto-path was about 9 turns estimate. I initiated the move order for the pioneer and it moved 2 tiles but somehow it skipped a couple of tiles (even over hilly terrain) and basically it moved 4 tiles with no roads. No idea how it happened, but the animations for movement did not play and the unit seemed to jump and skip.