I stayed for 7 nights.
My initial booking was for 4 nights complimentary room. During booking of room, system somehow spilt the booking confirmation into 3 nights and 1 night. First time I encounter this. Called hotline and got them to book for me. End up there is also 2 bookings - 3 nights and 1 night.
Subsequently, I added 3 more nights and paid with GP. So total 7 nights same room type Y5 deluxe.
In the past, checkin at kiosk will register for the entire 7 nights. But this time it allows me to checkin for 3 nights only. Asked the kiosk assistant and he said now the kiosk can only checkin max 3 nights. I have to go to counter to extend for the remaining nights if I want to continue same room.
Happened I need to change room as I got a room at B1. Room number 09xx. I thought it was level 9 . Got the Q number at 1pm. My Q was called about 5pm. This was on off-peak Mon.
My first booking was checkin 19 Jan checkout 23 Jan. Second booking was checkin 23 Jan checkout 26 Jan.
Processed change of room and did the extension of my room to checkout 26 Jan. Paid the tax for the 4 nights (tax for first 3 nights paid at kiosk).
Checked with them on key activation and was told by 22 Jan morning need to go counter to extend key activation. And 25 Jan need to extend again.
22 Jan went to get Q number. Activation of key is separate Q from room. But even then, each customer may take upto 10 minutes. Waited for 1 hr.
23 Jan I needed a second room key for my friend. Again had to Q and go counter. Waiting time about 3 hrs. But I could extend my room key by another day to 26 Jan so no need to go activate on 25 Jan. But they keep saying I did not pay my tax in full. Had to explain I paid 3 nights at kiosk and 4 nights at counter on same day.
But my friend's room card did not work and we realised only late at night. So 24 Jan had to get Q to activate the card properly. Again waited 1 hr. Again they said I did not pay tax in full

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Each time go counter to activate card, I had to show my member card and take photo. I get extra key for my friend they also took photo of me. Then photo of my friend.
So this inconvenience is probably to wipe out selling of rooms or passing rooms to other people.