Resize problems with IW 15.5.10/15.5.11

Hello, 

I have some problems with the latest INTRAWEB versions.

Edition: IntraWeb Ultimate Edition
IntraWeb Version: 15.5.9
32-bit Server on 64-bit Windows
HTTP Server is active on port: 80
HTTPS Server is active on port: 543 (OpenSSL v1.1.1)


In versions 15.5.10/15.5.11, a number of containers (TIWRegion, TIWListbox, TIWMemo etc.) are not displayed in their full size when a form is opened,
even though Align = alClient is set. The objects are only displayed in the correct size after the browser window is resized.

The RAD IDE displays gray sketchy layout information that appears to be generated by the INTRAWEB runtime and not by the RAD IDE.
The layout information largely covers the layout information of the RAD IDE and is therefore perceived as annoying.
How can this be turned off ?
This layout information continues to be displayed even when i return to IW15.5.9.


Best Regards
Juergen