After upgrading Libre Office from ver 5.0.6 to 5.1.5 and then to 126.96.36.199,
I noticed that many characters are faulty.
In the columns’ headings: A, B, C, D, etc.-
B → _ (underline),
D → a,
H → e,
J → g,
O → l,
W → t,
AB → A_,
… and so on.
In the rows’ headings: 1, 2, 3, 4, etc. -
3 → P,
6 → S,
13 → 1P,
…and so on.
Also in other places in the program these errors occur.
And also in other applications of Libre Office.
I must say that I’m using a version with Hebrew Language,
I suppose the English version is clear of this bug.
I’ll try to uninstall Libre Office and then reinstall this time in English somehow