diff --git a/tcms/testruns/static/testruns/js/get.js b/tcms/testruns/static/testruns/js/get.js
index 3c8be61006..3be26b5ff8 100644
--- a/tcms/testruns/static/testruns/js/get.js
+++ b/tcms/testruns/static/testruns/js/get.js
@@ -627,7 +627,18 @@ function renderAdditionalInformation (testRunId, execution) {
                     casesInPlan = Object.keys(casesInPlan).map(id => parseInt(id))
 
                     for (const testCase of testCases) {
-                        const row = $(`.test-execution-case-${testCase.id}`)
+                        let rowSelector = `.test-execution-case-${testCase.id}`
+                        // Preferably operate over the exact execution row to prevent
+                        // appending new HTML onto existing values, e.g. Tags. See #3367
+                        //
+                        // Root cause of the bug in #3367 is that some fields contain icons
+                        // and pre-existing HTML coming from the template and we can't call .empty()
+                        // on them. When such TE is parametrized then there are multiple HTML rows
+                        // matching `rowSelector`/`testCase.id`, therefore the UI is appended to many times!
+                        if (execution) {
+                            rowSelector += `.test-execution-${execution.id}`
+                        }
+                        const row = $(rowSelector)
 
                         // when loading this page filtered by status some TCs do not exist
                         // but we don't know about it b/c the above queries are overzealous