Sg - Missing rule for table 252 while Trying to open ssh connection between 2 vm's

1.Add 2 security groups:
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Sg1=All_Tcp(ingress+Egress)
Sg2=Default

2.Lunch 2 vm's:
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vm_x assosiate to SG1
vm_y assosiate to SG2

Action:
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Try to open ssh connection from vm_x toward vm_y - connection failed!!

Defect:
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view vm_x ovs rules tables 40+41+42 and verify learn rule existence - o.k
view vm_y ovs rules tables 251+252+253 - no rules exist for table 252

Note!!!(see in Attachment comparison)
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Try to open ssh connection from vm_y to vm_x - o.k
it can be seen that afterward this step rule for table 252 is added and ssh connction from vm_x toward vm_y succeed