Avoid stale button reference in SvFrontendIntegrationTest

Fixes DACH-NY/cn-test-failures#6828

[ci]

Signed-off-by: Martin Florian <martin.florian@digitalasset.com>

Author: martinflorian-da

apps/app/src/test/scala/org/lfdecentralizedtrust/splice/integration/tests/SvFrontendIntegrationTest.scala

@@ -1084,7 +1084,7 @@ class SvFrontendIntegrationTest
             _ => checkNewVoteRequestInProgressTab(previousVoteRequestsInProgress),
           )
 
-          val (_, reviewButton) = actAndCheck(
+          actAndCheck(
             "sv1 operator creates a new vote request with a long expiration time", {
               submitSetDsoConfigRequestViaFrontend(
                 numMemberTrafficContractsThreshold = "42"
@@ -1097,6 +1097,8 @@ class SvFrontendIntegrationTest
             },
           )
           val requestId = eventually() {
+            // find the review button again because the DOM may have been updated
+            val reviewButton = checkNewVoteRequestInProgressTab(previousVoteRequestsInProgress + 1)
             reviewButton.underlying.click()
             val requestId =
               inside(find(id("vote-request-modal-content-contract-id"))) { case Some(tb) =>