diff --git a/ui/src/api/queries/logs.ts b/ui/src/api/queries/logs.ts
index 982ab4f0..0dfc8e5d 100644
--- a/ui/src/api/queries/logs.ts
+++ b/ui/src/api/queries/logs.ts
@@ -184,6 +184,10 @@ export function useInfiniteApplicationLogs(
   const useTimeRange = !args.exchangeId;
   const fromIso = useTimeRange ? timeRange.start.toISOString() : undefined;
   const toIso = useTimeRange ? timeRange.end.toISOString() : undefined;
+  // Relative presets (e.g. "last 1h") should live-tail: each fetch advances
+  // `to` to "now" so new rows that arrive after the page was first rendered
+  // show up on refetch. Absolute ranges keep their captured `to`.
+  const isLiveRange = useTimeRange && !!timeRange.preset;
 
   const sortedSources = (args.sources ?? []).slice().sort();
   const sortedLevels = (args.levels ?? []).slice().sort();
@@ -217,7 +221,8 @@ export function useInfiniteApplicationLogs(
       if (sourcesParam) qp.set('source', sourcesParam);
       if (levelsParam) qp.set('level', levelsParam);
       if (fromIso) qp.set('from', fromIso);
-      if (toIso) qp.set('to', toIso);
+      const effectiveTo = isLiveRange ? new Date().toISOString() : toIso;
+      if (effectiveTo) qp.set('to', effectiveTo);
       if (cursor) qp.set('cursor', cursor);
       qp.set('limit', String(pageSize));
       qp.set('sort', sort);