There is another issue connected to https://bugzilla.redhat.com/show_bug.cgi?id=900289.

When expose-all-logs is set to true I'm not able to get any participants of the listed transaction.

This is log from operation to get type of transaction and then see all participants.

Reading type of the transaction:
Succesful management operation {
    "operation" => "read-attribute",
    "address" => [
        ("subsystem" => "transactions"),
        ("log-store" => "log-store"),
        ("transactions" => "0:ffff0a280545:2d64af2f:54378290:3c")
    ],
    "name" => "type"
} with result {
    "outcome" => "success",
    "result" => "CosTransactions/XAResourceRecord"
}
Getting participants:
Succesful management operation {
    "operation" => "read-children-names",
    "address" => [
        ("subsystem" => "transactions"),
        ("log-store" => "log-store"),
        ("transactions" => "0:ffff0a280545:2d64af2f:54378290:3c")
    ],
    "child-type" => "participants"
} with result {
    "outcome" => "success",
    "result" => []
}