The background color of the selected grid row is only present in one of the grids

Hi, I have multiple grids being loaded into layouts that are switched by the sidebar, all of these grids share the same css class dhx_demo-exam-grid, and in this class the background color of the selected-row gets changed to a different color, but for whatever reason, only the first grid gets this attribute changed, even though all of the other attributes get applied correctly to all the grids.

I inspected the elements and was able to notice that the divs with the dhx_grid-selected-row class don’t have any width except for the first one.

Is there any way to fix this or to change the width in these grids to be able to give them that background?

.dhx_demo-exam-grid {
.dhx_grid-selected-row {
background-color: #2C5AA0A0;
pointer-events: none;

Unfortunately I was not able to reproduce your issue locally.
The following snippet seems to work well for me.
If the problem still occurs for you please, provide a complete demo code snippet or a demo link, where the problem can be reconstructed locally.