Dual flush toilet.
Let me elaborate.
For the last 3-4 months, the toilet had started to make noises. When I ran to it one day, found out that it had, all on its own, started to refill the cistern. No one had flushed it. This happened in 3-5 sec bursts once every week.
Lately, this has gone up to 2-3 times a day.
Took the lid off when flushing and the float always rises to the top properly, never sticks.
I can look for the make of the toilet/mechanism if that helps.