This happened twice in a row, so I guess it's a bug:
On the last mission of the Falaise pocket, where your troops start, there are some supplies (panzershrek, mortar, paks, nebels and an MG. Whenever I have my squad pick up the MG, they are stuck. I cannot click on them and use them as a unit, they are just frozen for the game.
I don't know where I would find the logs you recommend attaching. My technical knowledge of games is extremely limited, I just play them.