Having issues creating more than 47 sliders

This is probably happening because of a PHP setting on your hosting.
There is a PHP setting called ‘max_input_vars‘ – if this is too low, then this can cause issues if you have many slides (about 50+) or too many sliders on your page. Many hosting packages still have this PHP setting (max_input_var) configured to 1000, which is pretty low for modern WP sites.

This PHP setting can be increased, and there may be an option within your web hosting cPanel to do this, but you may have to contact your hosting provider support to change this PHP setting. There are other ways to set this PHP variable – see the following guides:
https://support.undsgn.com/hc/en-us/articles/213459869-Max-Input-Vars
https://themezly.com/docs/how-to-increase-the-max-input-vars-limit/