The subtitles are overlapping texts that are long enough to fit multiple lines.

I'm trying to solve this bug within the day

Should be fixed in the 1.1.1
Let me know if u still have this problem, unfortunatelly the Factorio GUI have an internal bug about right flow spacing, and from what I know dev aren't willing to solve. I have improved a bit the spacing now.

Anyway, thanks for ur report

I have also open a bug report to solve this bug better:
https://forums.factorio.com/viewtopic.php?f=7&t=83259

Way better, thanks for the quick reaction :)

U are welcome, let me know about any problem, I'm here to fix an improve.
Also Factorio dev confirm me that the GUI bug will remain, I try another way:
https://forums.factorio.com/viewtopic.php?f=28&t=83286
Hoping that at least this will be done