diff --git a/src/tactic/core/dom_simplify_tactic.cpp b/src/tactic/core/dom_simplify_tactic.cpp
index cec6eea09..ae2472348 100644
--- a/src/tactic/core/dom_simplify_tactic.cpp
+++ b/src/tactic/core/dom_simplify_tactic.cpp
@@ -348,6 +348,9 @@ expr_ref dom_simplify_tactic::simplify_and_or(bool is_and, app * e) {
     }
     
     pop(scope_level() - old_lvl);
+    // TODO: add stack for cache rather than destroy it completely everywhere
+    if (!is_and)
+        reset_cache();
     return { is_and ? mk_and(args) : mk_or(args), m };
 }