Let me prefix this by saying that I don't know much about bikes. Especially from the terminology perspective.
When riding, I can hear a relatively quiet click when I push down on the pedals. It happens when either of the pedals are in the upwards position, even when I try to put on continuous pressure during the whole rotation. I also feel a slight vibration when it clicks.
It seems to me that the sound is coming either from the pedals or from the part where they're attached but since I can't reproduce the issue when I turn the bike upside down, I can't pinpoint the source.
This started happening a couple of weeks ago. In the mean time I took the bike in for regular maintenance and it seemed to fix the issue but it came back the next day, or the day after.
What can I do to diagnose this issue? Should I just take it back to the repair shop, or is this something I can fix myself?
The bike is Ghost Kato 2.9 if that matters.