diff --git a/compiler/src/dotty/tools/dotc/core/Contexts.scala b/compiler/src/dotty/tools/dotc/core/Contexts.scala
index c575f7bc72f7..dec73f7243e8 100644
--- a/compiler/src/dotty/tools/dotc/core/Contexts.scala
+++ b/compiler/src/dotty/tools/dotc/core/Contexts.scala
@@ -1063,6 +1063,7 @@ object Contexts {
       sources.clear()
       files.clear()
       comparers.clear()  // forces re-evaluation of top and bottom classes in TypeComparer
+      comparersInUse = 0
 
     // Test that access is single threaded
 
diff --git a/tests/pos-macros/i18855/invoc.scala b/tests/pos-macros/i18855/invoc.scala
new file mode 100644
index 000000000000..2923abd4836a
--- /dev/null
+++ b/tests/pos-macros/i18855/invoc.scala
@@ -0,0 +1,3 @@
+import scala.language.experimental.captureChecking
+val x = run()
+
diff --git a/tests/pos-macros/i18855/macro.scala b/tests/pos-macros/i18855/macro.scala
new file mode 100644
index 000000000000..1c0ee28effbe
--- /dev/null
+++ b/tests/pos-macros/i18855/macro.scala
@@ -0,0 +1,7 @@
+import scala.quoted.*
+import scala.language.experimental.captureChecking
+
+def impl()(using Quotes): Expr[Unit] = '{()}
+inline def run(): Unit = ${impl()}
+
+