The situation is the resizemode = autoadjust is intermittently failing.

 

We have implemented multiple editors with a default height specified as well as the ResizeMode="AutoAdjust". The Default Height when defined alone will always be implemented and behaves as expected. When you introduce the ResizeMode="AutoAdjust" some controls will be a single line and others will take the default height. When a refresh is selected in the browser or the page is reloaded at times the AutoAdjust will be implemented and at times it will not.