fix(overmind): only trigger flushes of executions without a parent

Author: christianalfoni

packages/node_modules/overmind/src/index.ts

@@ -301,8 +301,8 @@ export class Overmind<ThisConfig extends IConfiguration>
       eventHub.on(EventType.OPERATOR_ASYNC, () => {
         proxyStateTree.getMutationTree().flush()
       })
-      eventHub.on(EventType.ACTION_END, () => {
-        proxyStateTree.getMutationTree().flush()
+      eventHub.on(EventType.ACTION_END, (execution) => {
+        if (!execution.parentExecution) proxyStateTree.getMutationTree().flush()
       })
 
       let nextTick