Hello,
The home page sliders work fine on non-mobile devices and on tablets in landscape mode.
On phones and tablets in portrait mode, however, they show only the pictures but not the menu buttons and the text that overlay the picture.
Is this a bug ?
Thanks for looking into this.
hey there
Thank you for the question
We have exact same on our demo:
https://colorlib.com/tyche/
text and buttons are hidden on the small screen devices because they are not visible
thank you for understanding 
I will close this case now, Feel free to contact us again if you have other questions Thanks!