Rekordbox 5.6.1 Beta 4 Sync Bug when using Memory Loop

Hi,
I've found a Sync bug with some audio file (not all file)

How to replay this:
Sync is ON for Deck 1 & 2
Deck 1 is MASTER
Load a track on deck 1
Play deck 1
Load a track on deck 2
Move to second memroy cue on deck 2
Play on Deck 2 -> No Phase/Beat Sync, Only BPM sync is OK

(Video with no controler connected, only internal sound card for audio)

https://youtu.be/f-jQiI1mgu4