I am using an iPhone 12 with the latest iOS I noticed this about 10 or so hours ago. I have logged out of game for over four hours then logged back in and still had same problem I am going to sleep now but hopefully it will be fixed in morning!
I’m having same issues - Got 2 hours unlimited lives and can’t use them! Have restarted app probably 30 times over last 10 hours. Have also restarted my phone etc