Getting error "mCols: Cannot perform this operation on a closed dataset" when going to triggers t (4334761)

Getting error "mCols: Cannot perform this operation on a closed dataset" when going to triggers tab under certain circumstances.
Steps to reproduce the problem:

Login to a database and:
1. Open schema browser
2. Create table (name and columns aren't important)
3. Click on the table name in the left part of schema browser
4. Open "data" tab in right part of schema browser
5. Click "drop selected table" on left part of schema browser and drop table
6. Click "triggers" tab on right part of schema browser
7. Click "Data" tab on right part of schema browser - error appearing "mCols: Cannot perform this operation on a closed dataset.