Renaming a page can freeze the entire app.
When renaming a page/layer, if you try to drag-select the text it can try to drag the layer and freeze the entire application in Google Chrome. (Have not tested other browsers)
You have to close and re-open the tab for it to work again, refreshing the page usually does not respond.
All fixed. Thanks, Ezra!
Dan from Moqups
Ezra Sharp commented