Exception when loading localized string from LoadAssetsAsync callback. (Bug in Unity?)

I have the following problem: I want to load several Addressable assets with a label. So I use
Addressables.LoadAssetsAsync<> with a list of asset label references and a callback method. I also add a callback to the handle like so:

Code (CSharp):

1.            
2. AssetLabelReference label = new AssetLabelReference
3. {
4.     labelString = Globals.ChapterLabel
5. };
6. var handle = Addressables.LoadAssetsAsync(label, onLoadedChapter);
7. if (handle.IsDone)
8. {
9.       onLoadedAllChapters?.Invoke(handle.Result, true);
10. }
11. else
12. {
13.       handle.Completed += operationHandle => HandleAddressableLoaded(operationHandle, onLoadedAllChapters);
14. }
15.  

The problem arises, when the callback "onLoadedAllChapters" is triggered. I then try to iterate over all the loaded objects and get a Localized string with an ID stored in them. The code for loading the string is the following:

Code (CSharp):

1.        
2.         public static string GetLocalizedString(string tableReference, string key)
3.         {
4.             if (!TryGetStringTable(tableReference, out var table))
5.             {
6.                 return "#ERROR#";
7.             }
8.  
9.             var entry = table.GetEntry(key);
10.             if (entry == null)
11.             {
12.                 Utils.LogError("There was no entry in table: " + tableReference + ", with key: " + key);
13.                 return "#ERROR#";
14.             }
15.             return entry.GetLocalizedString();
16.         }
17.  
18.         private static bool TryGetStringTable(string tableReference, out StringTable table)
19.         {
20.             table = LocalizationSettings.StringDatabase.GetTable(tableReference, LocalizationSettings.SelectedLocale);
21.             if (table == null)
22.             {
23.                 Utils.LogError("There was no localization table: " + tableReference);
24.                 return false;
25.             }
26.  
27.             return true;
28.         }
29.  

As I work with several localization tables in my project, one for each of the loaded "Chapters", I first look up the Localization Table for the corresponding Chapter and then get the string from it.
When I execute the code in this order, I get the following exception:
Exception: Reentering the Update method is not allowed

It seems to work at first, if I react to the onLoadedChapter callback, and load the strings one by one, as this callback is executed each time a single asset is found. But when I load another scene, and then come back to this scene, I am again confronted with the Exception mentioned above.

This all goes away, if I instead run the loading in a coroutine and use handle to yield until everything is loaded. But I might encounter a situation, where I can't rely on coroutines. Any suggestions what I could do? Is this a bug, and should I report it as such?