diff --git a/Project.toml b/Project.toml
index a1c8793713..96761fc14a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -2,7 +2,7 @@ name = "Pluto"
 uuid = "c3e4b0f8-55cb-11ea-2926-15256bba5781"
 license = "MIT"
 authors = ["Fons van der Plas <fonsvdplas@gmail.com>"]
-version = "0.12.14"
+version = "0.12.15"
 
 [deps]
 Base64 = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
diff --git a/frontend/components/LiveDocs.js b/frontend/components/LiveDocs.js
index b2e76994b8..1ed606039c 100644
--- a/frontend/components/LiveDocs.js
+++ b/frontend/components/LiveDocs.js
@@ -105,7 +105,7 @@ export let LiveDocs = ({ desired_doc_query, client, on_update_doc_query, noteboo
                         ? "Live docs"
                         : html`
                         <input
-                            title=${no_docs_found ? `"${state.searched_query}" not found!` : ""}
+                            title=${no_docs_found ? `"${state.searched_query}" not found` : ""}
                             id="live-docs-search"
                             placeholder="Search docs..."
                             ref=${live_doc_search_ref}
diff --git a/frontend/editor.css b/frontend/editor.css
index 796d247206..292d7a4284 100644
--- a/frontend/editor.css
+++ b/frontend/editor.css
@@ -1258,7 +1258,7 @@ pluto-helpbox > header > input {
     border: none;
 }
 pluto-helpbox.notfound > header > input {
-    color: red;
+    color: rgb(139, 139, 139);
 }
 pluto-helpbox > header > input:focus {
     outline: none;
diff --git a/src/runner/PlutoRunner.jl b/src/runner/PlutoRunner.jl
index 1ede12ae83..2655ec5a51 100644
--- a/src/runner/PlutoRunner.jl
+++ b/src/runner/PlutoRunner.jl
@@ -84,12 +84,15 @@ struct Computer
     output_globals::Vector{Symbol}
 end
 
+expr_hash(e::Expr) = objectid(e.head) + mapreduce(expr_hash, +, e.args; init=zero(ObjectID))
+expr_hash(x) = objectid(x)
 # TODO: clear key when a cell is deleted furever
-const computers = Dict{Expr,Computer}()
+const computers = Dict{ObjectID,Computer}()
 
 const computer_workspace = Main
 
-function register_computer(expr::Expr, input_globals::Vector{Symbol}, output_globals::Vector{Symbol})
+
+function register_computer(expr::Expr, key, input_globals::Vector{Symbol}, output_globals::Vector{Symbol})
     proof = ReturnProof()
 
     @gensym result
@@ -103,7 +106,7 @@ function register_computer(expr::Expr, input_globals::Vector{Symbol}, output_glo
 
     f = Core.eval(computer_workspace, e)
 
-    computers[expr] = Computer(f, proof, input_globals, output_globals)
+    computers[key] = Computer(f, proof, input_globals, output_globals)
 end
 
 function compute(computer::Computer)
@@ -190,10 +193,11 @@ function run_expression(expr::Any, cell_id::UUID, function_wrapped_info::Union{N
         wrapped = timed_expr(expr, proof)
         run_inside_trycatch(wrapped, cell_id, proof)
     else
-        local computer = get(computers, expr, nothing)
+        key = expr_hash(expr)
+        local computer = get(computers, key, nothing)
         if computer === nothing
             try
-                computer = register_computer(expr, collect.(function_wrapped_info)...)
+                computer = register_computer(expr, key, collect.(function_wrapped_info)...)
             catch e
                 # @error "Failed to generate computer function" expr exception=(e,stacktrace(catch_backtrace()))
                 return run_expression(expr, cell_id, nothing)
diff --git a/test/React.jl b/test/React.jl
index 93267e91d6..2de876885c 100644
--- a/test/React.jl
+++ b/test/React.jl
@@ -861,6 +861,8 @@ import Distributed
                 false
             end |> length
             """),
+            Cell("4"),
+            Cell("[5]"),
         ])
 
         update_run!(🍭, notebook, notebook.cells)
@@ -885,6 +887,16 @@ import Distributed
         update_run!(🍭, notebook, notebook.cells)
         @test 0.2 * good < notebook.cells[3].runtime / 1.0e9 < 1.5 * bad
 
+        old = notebook.cells[4].output_repr
+        setcode(notebook.cells[4], "4.0")
+        update_run!(🍭, notebook, notebook.cells[4])
+        @test old != notebook.cells[4].output_repr
+        
+        old = notebook.cells[5].output_repr
+        setcode(notebook.cells[5], "[5.0]")
+        update_run!(🍭, notebook, notebook.cells[5])
+        @test old != notebook.cells[5].output_repr
+
         WorkspaceManager.unmake_workspace((🍭, notebook))
     end
 
diff --git a/test/RichOutput.jl b/test/RichOutput.jl
index c2ffc13a39..2bd1158d0a 100644
--- a/test/RichOutput.jl
+++ b/test/RichOutput.jl
@@ -141,11 +141,11 @@ import Pluto: update_run!, WorkspaceManager, ClientSession, ServerSession, Noteb
                 Cell("DataFrame()"),
                 Cell("DataFrame(:a => [])"),
                 Cell("DataFrame(:a => [1,2,3], :b => [999, 5, 6])"),
-                Cell("DataFrame(rand(20,20))"),
-                Cell("DataFrame(rand(2000,20))"),
-                Cell("DataFrame(rand(20,2000))"),
-                Cell("@view DataFrame(rand(100,3))[:, 2:2]"),
-                Cell("@view DataFrame(rand(3,100))[2:2, :]"),
+                Cell("DataFrame(rand(20,20), :auto)"),
+                Cell("DataFrame(rand(2000,20), :auto)"),
+                Cell("DataFrame(rand(20,2000), :auto)"),
+                Cell("@view DataFrame(rand(100,3), :auto)[:, 2:2]"),
+                Cell("@view DataFrame(rand(3,100), :auto)[2:2, :]"),
                 Cell("DataFrame"),
                 Cell("Tables.table(rand(11,11))"),
                 Cell("Tables.table(rand(120,120))"),