I have not tested this price filter slider yet. I have no idea about this. Also we do not provide support for any third party plugin or theme. But if you need any data or any kind of information of our plugin then i can help you. I did not tested WooCommerce price filter slider with E-shopper for i can not tell anything about it. If you want me to test this for you then i can test it for you.
I understand current status.
Since dokan is woocomarce based system, it is very helpful docan can support woocomarce normal widget. (actually price filter is normal widget which was installed with woocomarce automatically.)
Anyway, At this moment, I want to make sure whether it is my dokan's issue or not.
Could you help to check your system is also has same phenomena or not?
I am really sorry for the misunderstanding. It is WooCommerce built in widget. I have tested this and i also get something wrong. I have to discuss with our developer team about this. Please allow me some time. After the discussion i will be back to you. Please keep patience.