Is your new grid element compatible with IE11?
Test element in edge/chrome etc

how it looks in ie11

Ive adde these bits of css to help with ie compatibility
@media screen and (-ms-high-contrast: active), screen and (-ms-high-contrast: none) {
.x-face-graphic img,
.x-image img {
width: 100% !important;
}
}
.no-preserve3d .x-text {
width: 100%;
}


