Fix LT-22235: Guess Word Gloss should use Root gloss (#421)

Author: jtmaxwell3

Src/LexText/Interlinear/SandboxBase.cs

@@ -1265,6 +1265,7 @@ private bool LoadRealDataIntoSec1(int hvoSbWord, bool fLookForDefaults, bool fAd
 				}
 				if (this.ShowMorphBundles)
 				{
+					bool hasMf = false;
 					var bldrError = new StringBuilder();
 					foreach (var mb in analysis.MorphBundlesOS)
 					{
@@ -1424,9 +1425,12 @@ private bool LoadRealDataIntoSec1(int hvoSbWord, bool fLookForDefaults, bool fAd
 							// improve performance. All the relevant data should already have
 							// been loaded while creating the main interlinear view.
 							LoadSecDataForEntry(entryReal, senseReal, hvoSbWord, cda, wsVern, hvoMbSec, fGuessing, sdaMain);
-							CopyLexEntryInfoToMonomorphemicWordGlossAndPos();
+							hasMf = true;
 						}
 					}
+					if (hasMf)
+						// Wait until all of the morphemes have been loaded (cf. LT-22235).
+						CopyLexEntryInfoToMonomorphemicWordGlossAndPos();
 					if (bldrError.Length > 0)
 					{
 						var msg = bldrError.ToString().Trim();