I have new bike with Shimano 105 R7020 and my left shifter has some oil/ grease on the spindle (see picture).
If I wash and wipe it and will show up again. I checked the oil reservoir and there is no leak and the braking function is normal. I already claimed the warranty and replaced with a new shifter but has the same oil/grease spot in the new shifter (left side of the spindle only). Is it only grease from the spindle or there is a leak on the hydraulic system? I do not find this on my right shifter.