application get cut during landscape and portrait mode

During the open of the application, when the devices is rotated in the landscape from the portrait or vice versa, there is a glitch observed for the 10 to 15 sec in the UI. User interface is cut down to half to the phone or tab screen. This issue is only observed in the 6.8.1 Qt version.

I have attached 3 screenshots.

1st one that how application should be look like(1000000120.png).

2nd & 3rd, after rotating into landscape to portrait and vice versa.