After a month a new update. This update is an attempt to reduce the lagginess on Safari and Chrome browsers. It looks like that when there are lot of bouquets, it takes a long time to get the initial program information. So that is now limited to three bouquets. If there are more than 3 bouquets, the program data is retrieved per channel and not all at once.
I hope that this will solve the lagging issues.... If not, please do contact me to see if there is something else what could case it.