Patch 7 happened to come almost "between campaigns" for me. Almost all my p7 play has come with new campaigns started since the update...so I haven't had this particular campaign start problem. I have, however, experienced several game freezes, most notably the "archer target" issue. Merging units (Ctrl+M) may also be a freeze trigger.

Have considered opting back out of this particular beta, primarily because of the archer freeze. Being able to target specific units is pretty darn important for missile units, to ensure they're firing for max effect. It's even more important when one is playing a steppe nomad faction where the early army is almost entirely horse archers!