Searching in a sequence object from the second document

This issue occurs in rev.2131. To reproduce the issue:

1. Load 2 different documents with sequence objects into UGENE, e.g. "generated.fa", "amino_sars.fa".
2. Drag a sequence object from another document into the opened one. => Both sequence objects are shown in one Sequence View (e.g. I dragged "generated.fa" to "amino_sars.fa").
3. Search for a pattern in the dragged sequence (e.g. "generated.fa").

!=> In the debug mode, an assert occurs:

...
void PVRowsManager::addAnnotation(Annotation* a, const QString& key) {
assert(!rowByAnnotation.contains(a));
...

In the release mode each annotation is shown twice in the Sequence Zoom View (see screenshot).