.misspelling {
  border-bottom: 1px dashed rgba(250, 128, 114, .5);
  position: absolute;
}

.spell-check-misspelling .region {
  border-bottom: 1px dashed rgba(250, 128, 114, .5);
  position: absolute;
}

Use non-deprecated class and add region class selector
Use non-deprecated class and add region class selector
