Problem with creation annotation with Simple Format for an amino acid sequence

Scenario:
1. Open amino asid sequence _common_data/fasta/AMINO.fa
2. Select 1-20 region
3. Push CTRL+N
4. In Create Annotation dialog select Genbank location
5. Add complement(1..20) region
6. Click Create button
Expected: Validation error "The 'complement' keyword cannot be present in the location of an amino acid sequence annotation".
7. Close an error and select Simple format with region 1-20
Note, that complement(1..20) is still present in the GenBank location
8. Click Create button
Expected: Annotation with simple format is created
Actual: The same validation error