Probably it mistakingly recognises as the full stop of an English sentence, but it doesn’t make sense to cut a fraction number in the middle.
I would suggest updating the rule to trim the string after a period only followed by whilte space. This could misbehave in case of numbered lists like "Score Section 1. This is important, " but better than now.
It cut off a line at the period in “Set up 21.1 build on remote”. It shows as “Set up 21.” It’s not currently sensitive to a trailing space on 0.10.11 on Mac.
Personally I’d prefer it included everything until a line break, but it definitely shouldn’t be cutting off version numbers.