Nested column macro causes broken table width in PDF export file

Bug summary

Nested column macro causes broken table width in PDF export file

Environment

Application: stock Confluence 6.2, 6.3.2 64bit Linux
Database: H2
Browser: 55.0.2883.95 (64-bit)

Replication steps

• Case 1, One-column table:

1. Create new confluence page
2. Create table1 1x column 2x rows
3. Add Column Macro to first column second row. Set column width to 50%
4. Add second nested table2 2x columns, 2x rows inside column macro
5. Click on "..." -> Export to PDF
   • Expected result
     Table1 width will be preserved in PDF file
   • Actual result
     Table1 width is broken on PDF export
     Replication steps recording:
     http://recordit.co/6Pa9dB5VZq

• Case 2. Mutli-column table

1. Create Confluence page
2. Create table1 2x columns 2x rows
3. Add Column Macro to first column second row. Set column width to 50%
4. Add second nested table2 2x columns, 2x rows inside column macro
5. Click on "..." -> Export to PDF
   • Expected result
     Table1 width will be preserved in PDF file
   • Actual result*
     Table1 width is broken on PDF export
     Replication steps recording (including workaround):
     http://recordit.co/Z1m1LkDfYl

Workaround

• Case 1: Extend table1 width to whole Confluence page
• Case 2: Unknown