There are 6 punctuation marks in the Armenian
՝ « » ։ ․ ֊
which not recognised by Sigil as word's separation marks.
May be just a hyphen "֊" not needs that behavior.
First 5 are never(!) part of words.
https://en.wikipedia.org/wiki/Armeni...et#Punctuation
To reproduce.
1. Just copy-paste the line below to the program.
"Good morning՝«»։․֊ all."
2. Make a double click on the word "morning".
3. You will see that 6 chars after the word also selected.
PS.
Make a double click on the word "morning" in Chrome or Edge, right here.
You will see that just "morning" is selected.