@paulbr do you know which version of the SPOE image you are using? The latest version 0.8 from the link above gives me the following failure:
See Logs:
1656043101.401659 [00] ModSecurity: LIBXML compiled version="2.9.12"
1656043101.401849 [00] ModSecurity: StatusEngine call: "2.9.5,nginx,1.7.0/1.7.0,8.44/8.44 2020-02-12,(null),2.9.12,d1"
1656043106.408018 [00] ModSecurity: StatusEngine call failed. Query: GIXDSLRVFRXGO2LOPAWDCLRXFYYC6MJO.G4XDALBYFY2DILZYFY2DIIBSGAZDALJQ.GIWTCMRMFBXHK3DMFEWDELRZFYYTELDE.GE.165604310
I also noticed there was no communication from haproxy to this instance which stopped my sites from loading after implementing the error options as you described above.