![2019-09-13~17_56_56]
understanding gif video >> https://user-images.githubusercontent.com/13694921/64868343-2fd92b00-d650-11e9-8f57-6462e54d8eff.gif
Having the same issue.
Chrome 77.0.3865.75 (Official Build) (64-bit)
TM 4.8.41
Windows 10
Mostly happens when scrolling but sometimes clicking inside the editor sets it off. Pulling up the browser's console can bring it back most of the time but it's half the normal size.
Already fixed at TM BETA, but not released yet, because the last release is in "Pending review" state since more than a week. 馃槩
However, you can workaround this issue by setting "Config Mode" to "Advanced" and insert this at the "Custom CSS" option:
.editor_100 {
height: unset !important;
}

@derjanb Thanks for the fix!
I was beginning to think Im going crazy. It was happening to me only on the first time I opened big scripts, but reloading the tab somehow fixed it. Custom layout css fixes it permanently, thanks.
Sorry for the delay. Fixed at the beta version a month again, but review took that long. 馃槷
Most helpful comment
Already fixed at TM BETA, but not released yet, because the last release is in "Pending review" state since more than a week. 馃槩
However, you can workaround this issue by setting "Config Mode" to "Advanced" and insert this at the "Custom CSS" option: