Messages in the dashboard "Overview" tab are sometimes duplicated

Sometimes messages can be duplicated after worklow execution finished.

Scenario:

1. Open the WD and load "_common_data/bowtie2/aligner_worker/bowtie2-aligner-paired.uwl" workflow.
2. Add input file "_common_data/reads/wrong_order/e_coli_tail_1.fastq" to "Upstream Reads" and "_common_data/reads/wrong_order/e_coli_tail_2.fastq" to "Downstream Reads".
3. Click on "Align Reads with Bowtie2" element, add "_common_data/e_coli/NC_008253.fa" as "Reference genome" and fill the "Output folder" field as you wish.
4. Run the workflow.
   Expected state: there is the only message in the dashboard "Overview" tab about skipped reads.
   Current state: the above-mentioned message is duplicated.

The reason is "ExternalToolRunTask.cpp" -> 276 and 286 lines .