How to prevent "pulling" up?

Question

css

I am writing a visual programming environment, there are some blocks. They consist of div, in it svg and pp - block text, the user can add blocks to blocks using elements, but when dragging one such block to another, the child (new) is pushed to the top How to fix this? CSS:<b class=".se-input-container">

.se-input-container {
    display:inline-block;
    box-sizing: border-box;
    min-width: 5rem;
    width: auto;
    min-height: 1.5rem;
    height: auto;
    background: white;
    border-radius: 10px;
}


.se-action .se-input-container,.se-event .se-input-container {
  position: relative;
  top: -0.3rem
}
.se-input-container:empty {
  margin-top: 0rem;
  position: relative;
  top: 5px
}
.se-action .se-input-container .se:first-of-type, .se-event .se-input-container .se:first-of-type {
    margin-top: -1.5rem !important;
    margin-left: -8px !important;
    transform: scale(1.0);
}

.se-include .se-input-container .se {
  margin-top: 0.5rem !important;
  margin-left: 1rem !important;
  transform: scale(0.999) !important;
}

.se-input-container {
  padding: 0.1rem;
  padding-top: 0.8rem;
  padding-bottom: 0.9rem;
}

.se-action .se-input-container,.se-event .se-input-container {
  position: relative;
  top: -0.3rem
}
.se-input-container:empty {
  margin-top: 0rem;
  position: relative;
  top: 5px
}