Back in December last year, it came to light that users with Android Wear 2.0 devices are experiencing short-duration lags and freezes in different scenarios. Turning off the "Ok Google" hotword detection fixed these problems.
Well, the latest update on the matter is that Google has fixed these lags and freezes. Here's what a Google employee said on the company's official issue tracker:
As clear from the comment above, you'll need to install Google app version 7.18.50 or later to get the fix. In case the problem persists for you, do let us know in comments below.