Sometimes I run into this, but it is usually not a critical issue that would prevent game release.
It seems this stutter is not related to framerate, but to how fast objects are drawn.
If the issue was related to framerate, the whole frame would pause for a fraction of second.. but in your video, only a horizontal section is affected.
Since you are using web preview, I suggest you test with other exports: (web on pc/mac, web on mobile, standalone desktop export..) and different browsers, it might be related to how browsers draw fast objects.
Did you experiment with the Advanced settings in your project settings? Framerate, composition, and GPU?
If you still believe this to be a bug, you can open an issue for it and attach your Cacti sample project along with your tests and findings.