Pillager patrols are exceeding their limit of 5 pillagers. I spotted a patrol consisting of 8 pillagers, one being a captain. They spawn frequently about 10-50 blocks from my village on hard difficulty. This wasn't the first time I spotted a too large group. The area where they spawn is in between 2 villages, often very close to both.
This report is invalid due to your game being modified when experiencing this issue. In the screenshots you've provided, I can see that there are connected glass textures, therefore indicating the use of a non-vanilla client since this desired effect isn't achievable in vanilla. Bug reports are only valid if the behavior can be recreated under completely vanilla circumstances.