Need help for synchro

Hello
I have a problem with the song mode synchronization between the two a4mk2 machines and the RytmMk2
For example when I write several lines in song mode:
A01 A02 A01 A02 on the rhythm and the same on the other I press play the reading starts normally but when I press pause on the master and I restart the reading there is one which starts at the beginning (l 'slave) and the other (the master) no… it annoys me a little because each time I have to listen to the whole song mode again…
on the other hand when I navigate on the master in song mode it moves to the same place on the slave when I press yes on the master it chooses the same pattern on the slave I don’t know if you understood but when I press play the slave starts from zero…
Thanks again for the help provided.

Really ? nobody can help me ?

I don’t use song mode really so my response might be out of touch, but

do you setup the song mode on both devices?
have you tried using only one for song mode sending the pattern change while other only accepting it?