[Tree] Phylip bootstrap gives incorrect zero as distance

1. Open UGENE v44.
2. Open COI.aln:
   1. Press Ctrl+O (⌘+O) ("Open...").
      The "Select files to open" dialog appears.
   2. Choose Unipro UGENE/data/samples/CLUSTALW/COI.aln.
      The Alignment Editor window appears.
3. Build the Phylip bootstrap tree.
   1. Click the "Build Tree" button on the editor toolbar.
      The "Build Phylogenetic Tree" dialog appears.
   2. Set
      1. Tree building method=PHYLIP Neighbor Joining,
      2. On the "Bootstrapping and Consensus Tree" tab, check the "Enable bootstrapping" checkbox,
      3. Seed (must be odd)=5.
   3. Click "Build".
4. Wait for the "Calculating Phylogenetic Tree" task to complete.
   The Phylogenetic Tree Viewer appears.
   Expected state: the tree looks like this
   
5. Open UGENE v50 and repeat steps 2--4.
   Current state: the tree contains only distances 0 and 100.
   
   Expected: the same as in v44.

The same data (0 and 100) is displayed in any Phylip bootstrap tree for any alignment file.