EoMPLS Issue

Hello,
I just finishes set up EoMPLS on Mikrotik using LDP based VPLS and the diagram is shown as below,

PE01(Mikrotik CCR1036-12G-4S) ↔ P01 (Cisco Router) ↔ P02 (Cisco Router) ↔ PE02 (Mikrotik CCR1036-12G-4S)

Unfortunately, the VPLS was run and stop running by itself with no particular time or period. During the VPLS tunnel stop running, I have verified the connectivity from PE01 to PE02 is readable and LDP neighbour from both PEs to Ps side were up as normal. Does anyone get same issue or experience? Please help to share if have any solution.

Thanks,