cant figure out how to know if an interstitial was shown/ dismissed

[AlecAcosta]

want to pause the game until the player closes the interstital ad, tried the full_screen_content_callback signals but i get no response
i print on screen with Global.label.text, it shows the message "interstitial loaded", then shows the ad but stays on the message "wainting for interstitial dismissed", then no more ads load cause no signal was fired to destroy the interstitial_ad to free it
im not pausing the game in this code, just testing what signals to use

my code:
`
func _ready() -> void:
if Engine.has_singleton("PoingGodotAdMob"):
MobileAds.initialize()
interstitial_ad_load_callback = InterstitialAdLoadCallback.new()
interstitial_ad_load_callback.on_ad_loaded = func(_interstitial_ad : InterstitialAd) -> void:
Global.label.text = "interstitial loaded"
interstitial_ad = _interstitial_ad

	full_screen_content_callback = FullScreenContentCallback.new()
	
	full_screen_content_callback.on_ad_clicked = func() -> void:
		Global.label.text = "clicked\n"+str(Time.get_ticks_msec())
		interstitial_ad.destroy()
		interstitial_ad = null
	
	full_screen_content_callback.on_ad_impression = func() -> void:
		Global.label.text = "ad impression\n"+str(Time.get_ticks_msec())
		interstitial_ad.destroy()
		interstitial_ad = null
		
	full_screen_content_callback.on_ad_failed_to_show_full_screen_content = func(ad_error : AdError) -> void:
		Global.label.text = "failed to show\n"+str(Time.get_ticks_msec())
		interstitial_ad.destroy()
		interstitial_ad = null
	
	full_screen_content_callback.on_ad_dismissed_full_screen_content = func() -> void:
		Global.label.text = "interstital dismissed\n"+str(Time.get_ticks_msec())
		interstitial_ad.destroy()
		interstitial_ad = null
	
	full_screen_content_callback.on_ad_showed_full_screen_content = func() -> void:
		Global.label.text = "interstital shown\n"+str(Time.get_ticks_msec())
		interstitial_ad.destroy()
		interstitial_ad = null

func show_interstitial():
Global.label.text = "waiting for\ninterstitial\ndismissed"
interstitial_ad.show()
`