I honestly feel like I've been seeing this on both twitter and snapchat for a few months or more at this stage. I do feel in comparison to some of the previous years. I think the lull has lasted a bit longer than normal. Instead of just the start of summer drop off and then slow pick up until say Football starts College and NFL, and then you know kind of dies back down a bit. Then rises and drops with the holiday season.
To the OP with you mentioning the room counts have stayed the same for you, but the tipping pattern has cut in half. Without any noticeable change on your end, my assumption would be maybe your collection of regulars might have over extended themselves and haven't quite paced back with their tips. Or it started with a higher ceiling and this might be the floor and hopefully it will kind of balance out and start going back up.
