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Description of problem:


Version-Release number of selected component (if applicable):
- Libreoffice Version: 5.3.6.1
  - Build ID: 5.3.6.1-19.el7
- kernel 3.10.0-957.21.3.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1. See attached document(private), starting at page 9
2.
3.

Actual results:
- block text schemas replaced by a black box

Expected results:
- block text schemas readable

Additional info:
- Issue does not occur when tested with same document on:
Libreoffice Version: 6.1.5.2
  - Build ID: 6.1.5.2-4.fc29
- Does not occur in Libreoffice 6.0.x in RHEL 8 (version 6.0.6.1-13.el8.x86_64)

reproducible

This is a regression due to the fix of bug #1589029

Created attachment 1592848 [details]
plausible fix

I just tested this with 7.7 and this is still an issue.

Verified with libreoffice-5.3.6.1-24.el7

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2020:1151