Strange behavior (bug?) using the ECHO effect on XDJ-RX2

I noticed a bug of the echo effect in the xdj-rx2 using firmware 1.20 and standalone mode.

How to reproduce this bug:

1. Activate the echo effect with any time (for example, 1 beat), any bpm (It doesn't matter if quantize is enabled or not). Turn the level/depth knob of the beat effects to the middle position (this is, pointing to 12 p.m.).

2. Activate the noise effect and turn the color knob in any direction for a very short period of time (or alternatively, you can make a short scratch using the jog wheel). Now you can hear the noise (or scratch) you generated, and the echo with a delay of 1 beat, everything behaving correctly.

3. Turn the level/depth knob to 3/4 (like pointing to 3 p.m.). Generate the noise (or scratch). The echo fades out a little later: still everything behaves good. Now, if you turn the level/depth knob for any value higher than 3/4, or to the maximum position, you will not hear the noise/scratch you generated, only the echoes.

I hope I explained myself correctly, if necessary I could upload a video.

Why is this happening? Can you correct it in a future firmware release?

Kind regards.