Frequently, the customers interacting with Agnes will not get a display image or the image will go by too fast, probably because I was clicking through the serving of alcohol too quickly. When this happens, you cannot interact with the customers at the table, forcing you to have to leave the table and come back, potentially wasting time.
Also, more rarely, a similar issue will appear where the buttons on the lower right will blank out because of the interaction, you will be stuck at the table and you cannot interact with any other tables. To get out of this, you have to be lucky enough to have the right alcohol to serve the customer, or hope he was trying to interact, otherwise it could soft lock you.
Edit:
Lol, forgot to say the game is great, looking forward to seeing where it goes.