On Joomla, If you have 1 slide and it's published on a page and then you view source, the code shows 2 slides. If you use the H1 tag, SEO tools show this as a duplicate H1 tag which is damaging to SEO. 

data-transition="notransition" data-slotamount="7" data-masterspeed="300" data-saveperformance="off" >src="https://www.sysfix.co.uk" alt="Homepage-background" data-bgposition="center bottom" data-bgfit="cover" data-bgrepeat="no-repeat" width="2200" height="727" />

data-x="center" data-hoffset="0" data-y="center" data-voffset="0" data-speed="300" data-start="500" data-easing="Power3.easeInOut" data-splitin="none" data-splitout="none" data-elementdelay="0.1" data-endelementdelay="0.1" data-endspeed="300"
style="z-index: 5; max-width: none; max-height: none; white-space: nowrap;">class="largetextcontract-door">SEO CONSULTANCYdata-transition="notransition" data-slotamount="7" data-masterspeed="300" data-saveperformance="off" >src="https://www.sysfix.co.uk" alt="Homepage-background" data-bgposition="center bottom" data-bgfit="cover" data-bgrepeat="no-repeat" width="2200" height="727" />

data-x="center" data-hoffset="0" data-y="center" data-voffset="0" data-speed="300" data-start="500" data-easing="Power3.easeInOut" data-splitin="none" data-splitout="none" data-elementdelay="0.1" data-endelementdelay="0.1" data-endspeed="300"
style="z-index: 5; max-width: none; max-height: none; white-space: nowrap;">class="largetextcontract-door">SEO CONSULTANCY

Your system is stripping out the code from my example above, but you will see slide 1 and slide 2 - i only have 1 slide