TIWjQDBGrid changing UI

[Comograma]

In form 1 it works as expected.

Make sure that you do what I did (using the CDN) and clear the browser cache.

Forgive me but it doesn't. I clear browser's cache, cookies, etc...

The buttons are not flat, neither the IWBSSelects if I use the plugin
IWBSAddGlobalLinkFile('https://cdn.jsdelivr.net/npm/bootstrap-select@1.13.18/dist/css/bootstrap-select.min.css');
IWBSAddGlobalLinkFile('https://cdn.jsdelivr.net/npm/bootstrap-select@1.13.18/dist/js/bootstrap-select.min.js');

See attached images. 
Image "01 - notOK (Form1).jpg" if not OK, the buttons are not flat as it should.
Image "02 - OK (Form2).jpg is OK, buttons are flat.

I attached also the test case exactly how I last tested it here.
Tested in 3 browser with same result: Edge, Chrome and IE.

Also if you change something on the test case, send it to me so that I can test it here exactly how you did it!!