RoutingContext.vertx() returns null after reroute

[enrcor01]

Version

• vert.x core: 3.4.1
• vert.x web: 3.4.1

Context

I need to redirect inside my application to create some kind of state machine based on handlers.
But when I try to delay the execution of the next context after rerouting using
ctx.vertx().setTimer(500, t -> ctx.next());

RoutingContext.vertx() returns null.

Any idea why?