Text sizes change randomly

Hi Team - I guess this is part of the new update - Text boxes are suddenly behaving randomly.. In some places the text suddenly completely doesnt fit anymore.. and other places weird things are happening - see the images attached. Just by changing the size of the window, one of the textboxes scales, the other changes size as the window does - but when I look at the textbox settings I can see no difference between the two boxes.. what is happening here? Apart from wrecking my lovely layout! - Luckily, this seems to have only happened to a few textboxes, but I've had to go through the project after publishing and replace many of the affected boxes with images from the preview - what's going on? and how can I make sure they all scale properly and appear as they do in preview?