I also had a bug in my B U23 team. In those two games:
My 4th line was removed. However, I didn't have such a setting in my tactics. At least, it wasn't in the list, visible to me, when I checked yesterday.
I had this setting the season before, however, I deleted it coming into this new season, since I put my weak line in position 1.
Now, I completely reset my league game tactical settings by deleting every setting and put everything from scratch.
do you have good answer from the HA server? means if u will use cmd and ping www.hockeyarena.net -t