In Dynamic view if you have a min height or width set, you can't write a number, because after insert first digit, the field autocomplete with the min height.
If you have min height 100, then you can't cancel 100, because field autocomplete immediately, and if you select the number 100 and start to write like "800" after put 8 the field autocomplete 100!
If you have to put 800 you can't! or you use arrow for 700 times!
The best way is the possibility to enter number you want and then a popup say (min o max height/width....), not to autocomplete the filed with min height at first digit.
Will be fixed in next update.