Currently the entities in the indicator name gets double decoded
<indicator name="1&2&3&amp;4&amp;amp;5">Indicator</indicator>
gets rendered to
<div class="mw-indicator" id="mw-indicator-1.262.263.264.26amp.3B5">Indicator</div>
Expected result:
<div class="mw-indicator" id="mw-indicator-1.262.263.26amp.3B4.26amp.3Bamp.3B5">Indicator</div>