Stuck in base (Gameplay)

Today, in the beginning of the game I got stuck on the alter. I had a lot of tabs up on my browser and I was loading up slowly and when I got in game it was already 40 seconds in and everyone was in there lane except for me. I tried leaving but I couldn't like there was a magic barrier. I even tried flashing and I did flash over this said magic barrier but my champion walked back up to the alter and was stuck again. All I had to do was disconnect and then reconnect but it was kind of freaky especially the flash part. Just letting you guys know. Keep doing a good job