SAFE_POINT after removing PCR result in annotation table

Scenario

1. Load _common_data\fasta\DNA.fa
2. Select "Merge sequence ..." option in the Sequence Reading Option dialog
3. Open "PCR Prmer Design .." tab in the Option panel
4. Set "Melting point .."=54 C
5. Push Start button
   Expected state: 4 records in the result table
6. Select "PCR Prmer Design .." in annotation section
7. Remove it from context menu Remove->Select objects with annotation from view
8. Select any record in the Option panel, see attached picture
   SAFE POINT is trigerred:
   Trying to recover from error: Invalid annotation table! at D:\ugene2\src\corelibs\U2View\src\ov_sequence\AnnotationsTreeView.cpp:347
   Assertion failed: 0 != a->getGObject() && ctx->getAnnotationObjects(true).contains(a->getGObject()), file D:\ugene2\src\corelibs\U2View\src\ov_sequence\AnnotationsTreeView.cpp, line 347