diff --git a/models/issue.go b/models/issue.go
index 0429ac4c8c..8a6b20727a 100644
--- a/models/issue.go
+++ b/models/issue.go
@@ -990,6 +990,17 @@ func (issue *Issue) GetLastEventLabel() string {
 	return "repo.issues.opened_by"
 }
 
+// GetLastEventLabelFake returns the localization label for the current issue without providing a link in the username.
+func (issue *Issue) GetLastEventLabelFake() string {
+	if issue.IsClosed {
+		if issue.IsPull && issue.PullRequest.HasMerged {
+			return "repo.pulls.merged_by_fake"
+		}
+		return "repo.issues.closed_by_fake"
+	}
+	return "repo.issues.opened_by_fake"
+}
+
 // NewIssueOptions represents the options of a new issue.
 type NewIssueOptions struct {
 	Repo        *Repository
diff --git a/options/locale/locale_en-US.ini b/options/locale/locale_en-US.ini
index 331b94db3c..2d739dd23f 100644
--- a/options/locale/locale_en-US.ini
+++ b/options/locale/locale_en-US.ini
@@ -770,8 +770,10 @@ issues.action_assignee = Assignee
 issues.action_assignee_no_select = No assignee
 issues.opened_by = opened %[1]s by <a href="%[2]s">%[3]s</a>
 pulls.merged_by = merged %[1]s by <a href="%[2]s">%[3]s</a>
+pulls.merged_by_fake = merged %[1]s by %[2]s
 issues.closed_by = closed %[1]s by <a href="%[2]s">%[3]s</a>
 issues.opened_by_fake = opened %[1]s by %[2]s
+issues.closed_by_fake = closed %[1]s by %[2]s
 issues.previous = Previous
 issues.next = Next
 issues.open_title = Open
diff --git a/templates/repo/issue/list.tmpl b/templates/repo/issue/list.tmpl
index deed251cda..78352acb50 100644
--- a/templates/repo/issue/list.tmpl
+++ b/templates/repo/issue/list.tmpl
@@ -220,7 +220,12 @@
 
 					<p class="desc">
 						{{ $timeStr := TimeSinceUnix .GetLastEventTimestamp $.Lang }}
-						{{$.i18n.Tr .GetLastEventLabel $timeStr .Poster.HomeLink .Poster.Name | Safe}}
+
+						{{if gt .Poster.ID 0}}
+							{{$.i18n.Tr .GetLastEventLabel $timeStr .Poster.HomeLink .Poster.Name | Safe}}
+						{{else}}
+							{{$.i18n.Tr .GetLastEventLabelFake $timeStr .Poster.Name | Safe}}
+						{{end}}
 
 						{{$tasks := .GetTasks}}
 						{{if gt $tasks 0}}
diff --git a/templates/repo/issue/milestone_issues.tmpl b/templates/repo/issue/milestone_issues.tmpl
index f2298dfdab..c81f6adf8b 100644
--- a/templates/repo/issue/milestone_issues.tmpl
+++ b/templates/repo/issue/milestone_issues.tmpl
@@ -203,7 +203,11 @@
 					{{end}}
 
 					<p class="desc">
-						{{$.i18n.Tr "repo.issues.opened_by" $timeStr .Poster.HomeLink .Poster.Name | Safe}}
+						{{if gt .Poster.ID 0}}
+							{{$.i18n.Tr .GetLastEventLabel $timeStr .Poster.HomeLink .Poster.Name | Safe}}
+						{{else}}
+							{{$.i18n.Tr .GetLastEventLabelFake $timeStr .Poster.Name | Safe}}
+						{{end}}
 						{{$tasks := .GetTasks}}
 						{{if gt $tasks 0}}
 							{{$tasksDone := .GetTasksDone}}
diff --git a/templates/repo/issue/view_content/sidebar.tmpl b/templates/repo/issue/view_content/sidebar.tmpl
index 47bf67f903..1f5481530a 100644
--- a/templates/repo/issue/view_content/sidebar.tmpl
+++ b/templates/repo/issue/view_content/sidebar.tmpl
@@ -112,7 +112,7 @@
 			<span class="text"><strong>{{.i18n.Tr "repo.issues.num_participants" .NumParticipants}}</strong></span>
 			<div>
 				{{range .Participants}}
-					<a href="{{.HomeLink}}">
+					<a {{if gt .ID 0}}href="{{.HomeLink}}"{{end}}>
 						<img class="ui avatar image poping up" src="{{.RelAvatarLink}}" data-content="{{.DisplayName}}" data-position="top center" data-variation="small inverted">
 					</a>
 				{{end}}
diff --git a/templates/user/dashboard/feeds.tmpl b/templates/user/dashboard/feeds.tmpl
index 849ad7fb2f..ffc0db3317 100644
--- a/templates/user/dashboard/feeds.tmpl
+++ b/templates/user/dashboard/feeds.tmpl
@@ -7,7 +7,11 @@
 			<div class="ui fourteen wide column">
 				<div class="{{if or (eq .GetOpType 5) (eq .GetOpType 18)}}push news{{end}}">
 					<p>
-						<a href="{{AppSubUrl}}/{{.GetActUserName}}" title="{{.GetActFullName}}">{{.ShortActUserName}}</a>
+						{{if gt .ActUser.ID 0}}
+							<a href="{{AppSubUrl}}/{{.GetActUserName}}" title="{{.GetActFullName}}">{{.ShortActUserName}}</a>
+						{{else}}
+							{{.ShortActUserName}}
+						{{end}}
 						{{if eq .GetOpType 1}}
 							{{$.i18n.Tr "action.create_repo" .GetRepoLink .ShortRepoPath | Str2html}}
 						{{else if eq .GetOpType 2}}
diff --git a/templates/user/dashboard/issues.tmpl b/templates/user/dashboard/issues.tmpl
index b5990e61e0..93286df578 100644
--- a/templates/user/dashboard/issues.tmpl
+++ b/templates/user/dashboard/issues.tmpl
@@ -86,7 +86,11 @@
 							{{end}}
 
 							<p class="desc">
-								{{$.i18n.Tr "repo.issues.opened_by" $timeStr .Poster.HomeLink .Poster.Name | Safe}}
+								{{if gt .Poster.ID 0}}
+									{{$.i18n.Tr .GetLastEventLabel $timeStr .Poster.HomeLink .Poster.Name | Safe}}
+								{{else}}
+									{{$.i18n.Tr .GetLastEventLabelFake $timeStr .Poster.Name | Safe}}
+								{{end}}
 								{{if .Assignee}}
 									<a class="ui right assignee poping up" href="{{.Assignee.HomeLink}}" data-content="{{.Assignee.Name}}" data-variation="inverted" data-position="left center">
 										<img class="ui avatar image" src="{{.Assignee.RelAvatarLink}}">