diff --git a/federationapi/internal/federationclient.go b/federationapi/internal/federationclient.go
index b31db466..0ab10546 100644
--- a/federationapi/internal/federationclient.go
+++ b/federationapi/internal/federationclient.go
@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"github.com/matrix-org/gomatrixserverlib"
+	"github.com/sirupsen/logrus"
 )
 
 // Functions here are "proxying" calls to the gomatrixserverlib federation
@@ -157,6 +158,7 @@ func (a *FederationInternalAPI) MSC2836EventRelationships(
 	ctx, cancel := context.WithTimeout(ctx, time.Minute)
 	defer cancel()
 	ires, err := a.doRequestIfNotBlacklisted(s, func() (interface{}, error) {
+		logrus.Infof("FederationInternalAPI calling MSC2836EventRelationships on %s", s)
 		return a.federation.MSC2836EventRelationships(ctx, s, r, roomVersion)
 	})
 	if err != nil {
diff --git a/setup/mscs/msc2836/msc2836.go b/setup/mscs/msc2836/msc2836.go
index 8a35e414..706fd1fb 100644
--- a/setup/mscs/msc2836/msc2836.go
+++ b/setup/mscs/msc2836/msc2836.go
@@ -36,6 +36,7 @@ import (
 	userapi "github.com/matrix-org/dendrite/userapi/api"
 	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/matrix-org/util"
+	"github.com/sirupsen/logrus"
 )
 
 const (
@@ -342,6 +343,7 @@ func (rc *reqCtx) fetchUnknownEvent(eventID, roomID string) *gomatrixserverlib.H
 		logger.WithError(err).Error("failed to QueryJoinedHostServerNamesInRoom")
 		return nil
 	}
+	logger.Infof("::DEBUG:: QueryJoinedHostServerNamesInRoom %v", queryRes.ServerNames)
 	// query up to 5 servers
 	serversToQuery := queryRes.ServerNames
 	if len(serversToQuery) > 5 {
@@ -477,6 +479,7 @@ func (rc *reqCtx) MSC2836EventRelationships(eventID string, srv gomatrixserverli
 		MaxDepth:    rc.req.MaxDepth,
 		RecentFirst: rc.req.RecentFirst,
 	}, ver)
+	logrus.Infof("::DEBUG:: fedinternal calling MSC2836EventRelationships %+v err=%v", res, err)
 	if err != nil {
 		util.GetLogger(rc.ctx).WithError(err).Error("Failed to call MSC2836EventRelationships")
 		return nil, err