My findings on Arch Linux where are strongly suggesting it indeed is: LANG=de_DE.UTF-8 → problem is manifest as depicted above, LANG={C;en_US.UTF-8} → problem ceases.
Btw. this is another hint the issue is not a duplicate of bug #1644003 besides the findings are somewhat similar.
> Maybe it is related:
My findings on Arch Linux where are strongly suggesting it indeed is: LANG=de_DE.UTF-8 → problem is manifest as depicted above, LANG={C; en_US.UTF- 8} → problem ceases.
Btw. this is another hint the issue is not a duplicate of bug #1644003 besides the findings are somewhat similar.