LFO 1 malfunction

Hello everyone,
I have a functional question with LFO1. Modulating the VCA, and applying a delay in LFO1, this does not always work, it happens that in some notes the delay does not work.
If Binaural mode is used then it works correctly.
To check it, set the delay to the top and the VCA modulation to the top.
I apologize for my low level of English.
Greetings from Spain