Nothing new - I often find pictures I like, only to read comments of mine demonstrating I must have clicked the hearts ages ago when they were first posted...
I noticed that the amount of likes on all of my photos has significantly decreased. Many of them have less than 5 now, when there used to be much more. It's like the number got reset or something. Checked out other people's albums and noticed, similarly, very few likes on photos that I remembered being very popular.
Hi guys, this is a known issue and I hope to have it resolved soon. For the record, loves cannot last forever, and eventually they will have to be removed. I'm working with the thresholds and I hope to keep them a lot longer, as they should not be disappearing as quickly as they are.