Yes. There may be a problem here but it has NOTHING to do with latency. Latency, as I keep saying but no-one hears, is to do with what you HEAR not what is RECORDED and QUANTISED by Cubase.
Where Cubase places notes has nothing to do with what you hear (which could be anything). It is all to do with what key you press and when.
Don’t be fooled by the extra offset caused by increased buffer size. That has more to do with the player.
When you hit a note Cubase will put it at the closest QUANTISE point it finds after calculating the time it received the midi keypress note.
To prove this turn your headphones and speakers off and play by looking at the screen (yes, it does sound a mad idea). Then check what you have recorded.