Possibly fixes UI crash

app/src/main/java/net/pokeranalytics/android/util/billing/AppGuard.kt

@@ -2,6 +2,8 @@ package net.pokeranalytics.android.util.billing
 
 import android.app.Activity
 import android.content.Context
+import android.os.Handler
+import android.os.Looper
 import com.android.billingclient.api.*
 import net.pokeranalytics.android.BuildConfig
 import net.pokeranalytics.android.R
@@ -208,7 +210,9 @@ object AppGuard : PurchasesUpdatedListener {
 
 					this._isProUser = true
 					this.purchaseDelegate?.let {
-						it.purchaseDidSucceed(purchase)
+						Handler(Looper.getMainLooper()).post {
+							it.purchaseDidSucceed(purchase)
+						}
 						this.purchaseDelegate = null
 					}
 				}