a question I ever wanted to ask: Is it normal, that if you have activated the arpeggiator and press a key on the keyboard, that the first tone of the arpeggio comes a little bit delayed and not immediately while pressing the key on the keyboard?
Are you activating “sync” on the arpeggiator/sequencer? If so, it’s likely that you are playing on the back side of the beat (or with enough latency) that it’s missing the sync pulse for that subdivision, and is starting on the next subdivision.