Tested in LibreOffice 6.4.6.2 (known bug: CTL language must be set as "none") on Ubuntu 20.04.1 LTS with keyboard layout "Old Hungarian" (keyboard layout is within the extras)
Issue
When I press letter-combinations for ligatures 'ad', 'att','np','ra','ar','var','za' and 'csin' (cs+i+n), the ligatures appears non-exactly-good forms. Several of the faulty form are more visible in higher font-size. The problems are given in LTR forms, too.
Codes of ligatures:
'ad' (uni10CC0_10CC7) activator sequence: uni10CC0, uni10CC7
'att' (uni10CC0_10CE6_10CE6) activator sequence:uni10CC0,uni10CE6, uni10CE6
'np' (uni10CD9_10CE0) activator sequence: uni10CD9,uni10CE0
'ra' (uni10CE2_10CC0) activator sequence: uni10CE2,uni10CC0
'ar' (uni10CC0_10CE2) activator sequence: uni10CC0, uni10CE2
'var' (uni10CEE_10CC0_10CE2) activator sequence: uni10CEE,uni10CC0,uni10CE2
'za' (uni10CEF_10CC0) activator sequence:uni10CEFmuni10CC0
'csin' (uni10CC6_10CD0_10CD9) activator sequence:uni10CC6,uni10CD0,uni10CD9
Screenshot
On the screenshot the ligatures appears RTL form, as usual.
Defect Report
https://github.com/googlefonts/noto-fonts/blob/master/unhinted/ttf/NotoSansOldHungarian/NotoSansOldHungarian-Regular.ttf font, version 2.002 has form problems of ligatures 'ad','att','np','ra','ar','var','za' and 'csin'
Font
'NotoSansOldHungarian-Regular.ttf'.
Where the font came from, and when
Site: https://github.com/googlefonts/noto-fonts/blob/master/unhinted/ttf/NotoSansOldHungarian/NotoSansOldHungarian-Regular.ttf
Date: 2020-12-18
Font Version
2.002
Application name and version
Tested in LibreOffice 6.4.6.2 (known bug: CTL language must be set as "none") on Ubuntu 20.04.1 LTS with keyboard layout "Old Hungarian" (keyboard layout is within the extras)
Issue
When I press letter-combinations for ligatures 'ad', 'att','np','ra','ar','var','za' and 'csin' (cs+i+n), the ligatures appears non-exactly-good forms. Several of the faulty form are more visible in higher font-size. The problems are given in LTR forms, too. Codes of ligatures: 'ad' (uni10CC0_10CC7) activator sequence: uni10CC0, uni10CC7 'att' (uni10CC0_10CE6_10CE6) activator sequence:uni10CC0,uni10CE6, uni10CE6 'np' (uni10CD9_10CE0) activator sequence: uni10CD9,uni10CE0 'ra' (uni10CE2_10CC0) activator sequence: uni10CE2,uni10CC0 'ar' (uni10CC0_10CE2) activator sequence: uni10CC0, uni10CE2 'var' (uni10CEE_10CC0_10CE2) activator sequence: uni10CEE,uni10CC0,uni10CE2 'za' (uni10CEF_10CC0) activator sequence:uni10CEFmuni10CC0 'csin' (uni10CC6_10CD0_10CD9) activator sequence:uni10CC6,uni10CD0,uni10CD9
Screenshot
On the screenshot the ligatures appears RTL form, as usual.