When I say ‘on your left/right’ when on a bike I make sure I have given them plenty of time and prepare to pass on the opposite side, because the main reaction

When I say ‘on your left/right’ when on a bike I make sure I have given them plenty of time and prepare to pass on the opposite side, because the main reaction I generally get is someone stepping into the side I said - a lot of people have difficulty with their sides, and/or the processing time for something like that is always longer than you expect!