UGENE crashes on shutdown cancellation

1. Open several sequence files in UGENE
2. Do a pattern search for each of them and create new annotation tables with results
3. Open WD, create some workflow
4. Switch to a Sequence View window
5. Close UGENE window
Expected state: dialog asking about saving files has appeared
6. Press "No to all"
Expected state: dialog asking about saving the workflow has appeared
7. Press "Cancel"
8. Switch to Sequence View.
Expected state: UGENE can continue working normally
Current state: UGENE crashes after you click any widget