Yup, started noticing it last week.

Wouldn't that cause a problem for advertisers where the entirety of their 2 description lines forms a single sentence?

Too busy with work to have noticed it. I did notice in the online interface a change that shows two versions of how your ads may be displayed. The version showing the extended title with the first line always requires a punctuation.

Didn't Google say this was a test in the first place? Meaning, in the future they could remove this feature. Or, change the rules a little bit as you've noticed.

> Wouldn't that cause a problem...

This feature does change the way you potentially create your ads and whether you're on top of the SERPs or beside them. To me, it's the biggest shift in thinking for advertisers ever. Still remains to be seen if it's permanent or not.

The version showing the extended title with the first line always requires a punctuation.

I'd not played much with the new interface, but if it's not using the same rules, it's a little annoying.

I guess the biggest annoyance is that it's breaking some of my ads* which isn't in itself problematic - I can see the logic in testing this sort of thing, but they didn't warn us about this one so it feels a little more unexpected to have to check and alter copy without knowing the rules.

*Yes, I know that in general it's better not to split a phrase over two lines, but I like to experiment, and for some ads at least I am confident that it will always place above the SERPs and therefore always display on a single line anyway. YMMV.

Yet more variations I've seen recently:

Sometimes if the punctuation turns up halfway through the second line, the first part of the second line will get bumped up too. The titles are sometimes getting as long as or longer than the SERPs.