get_isActiveAndEnabled can only be called from the main thread + Google AdMob

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Hello,
I have implemented AdMob and added google Consent screen according to official documentation (https://developers.google.com/admob/unity/privacy). On the first run, when user have to comply with gdpr etc. I am getting this error when granting reward:

2024.03.08 09:43:51.331 27565 27922 Error Unity UnityException: get_isActiveAndEnabled can only be called from the main thread.
2024.03.08 09:43:51.331 27565 27922 Error Unity Constructors and field initializers will be executed from the loading thread when loading a scene.
2024.03.08 09:43:51.331 27565 27922 Error Unity Don't use this function in the constructor or field initializers, instead move initialization code to the Awake or Start function.
2024.03.08 09:43:51.331 27565 27922 Error Unity   at TMPro.TextMeshProUGUI.SetVerticesDirty () [0x00000] in <00000000000000000000000000000000>:0 
2024.03.08 09:43:51.331 27565 27922 Error Unity   at TMPro.TMP_Text.set_text (System.String value) [0x00000] in <00000000000000000000000000000000>:0 
2024.03.08 09:43:51.331 27565 27922 Error Unity   at Assets._GAME_.GUI.UpgradeButton.Setup () [0x00000] in <00000000000000000000000000000000>:0 
2024.03.08 09:43:51.331 27565 27922 Error Unity   at Assets._GAME_.Ads.RewardedAdUnit+<>c__DisplayClass16_0.<Show>b__0 (GoogleMobileAds.Api.Reward reward) [0x00000] in <00000000000000000000000000000000>:0 
2024.03.08 09:43:51.331 27565 27922 Error Unity   at GoogleMobileAds.Api.RewardedAd+<RegisterAdEvents>c__AnonStorey4.<>m__0 () [0x00000] in <00000000000000000000000000000000>:0 
2024.03.08 09:43:51.331 27565 27922 Error Unity   at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection

I thought that this piece, where calling initialize in callback might be the problem:

ConsentForm.LoadAndShowConsentFormIfRequired((FormError formError) =>
    {
        if (formError != null)
        {
            // Consent gathering failed.
            UnityEngine.Debug.LogError(consentError);
            return;
        }

        // Consent has been gathered.
        if (ConsentInformation.CanRequestAds())
        {
            MobileAds.Initialize((InitializationStatus initstatus) =>
            {
              // TODO: Request an ad.
            });
        }
    });

Of course I have configured MobileAds.RaiseAdEventsOnUnityMainThread = true;

But I also tried just setting flag and initializing ads in update method. But still getting the same error on the first game run. If I agree or disagree on the next app launch everything works fine.

Does anyone had similar problem?

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