Tabs using direct route [Angular 8]

Ionic Framework
1

Hi,
I’ve just upgraded to Angular 8 and Ionic angular to 4.7.1, ionic-cli latest version, I have a problem with tabs, when I go directly to the route it gives me an weird problem:

ScheduleDetailPage.html:25 ERROR Error: Error: Expression is empty
    at viewWrappedDebugError (core.js:25479)
    at callWithDebugContext (core.js:39726)
    at Object.debugCheckAndUpdateView [as checkAndUpdateView] (core.js:39299)
    at ViewRef_.detectChanges (core.js:27092)
    at ApplicationRef.tick (core.js:35380)
    at core.js:35228
    at ZoneDelegate.invoke (zone-evergreen.js:359)
    at Object.onInvoke (core.js:34201)
    at ZoneDelegate.invoke (zone-evergreen.js:358)
    at Zone.run (zone-evergreen.js:124)
    at NgZone.run (core.js:34066)
    at Object.next (core.js:35225)
    at SafeSubscriber.schedulerFn [as _next] (core.js:31051)
    at SafeSubscriber.__tryOrUnsub (Subscriber.js:183)
    at SafeSubscriber.next (Subscriber.js:122)
    at Subscriber._next (Subscriber.js:72)
    at Subscriber.next (Subscriber.js:49)
    at EventEmitter.next (Subject.js:39)
    at EventEmitter.emit (core.js:31013)
    at checkStable (core.js:34144)
    at Object.onHasTask (core.js:34221)
    at ZoneDelegate.hasTask (zone-evergreen.js:411)
    at ZoneDelegate._updateTaskCount (zone-evergreen.js:431)
    at Zone._updateTaskCount (zone-evergreen.js:264)
    at Zone.runTask (zone-evergreen.js:185)
    at drainMicroTaskQueue (zone-evergreen.js:559)
    at ZoneTask.invokeTask [as invoke] (zone-evergreen.js:469)
    at invokeTask (zone-evergreen.js:1603)
    at XMLHttpRequest.globalZoneAwareCallback (zone-evergreen.js:1640)

and in that line I only have this

<ion-input [(ngModel)]="entity.cronExpression" name="cronExpression" required></ion-input>

is a bug that have to do with angular / ionic integration? or what’s going on?