The browser of the support team of HikaShop, the e-commerce extension for Joomla and WordPress made by Hikari Software.
When a merchant asks our support for help with their shop (on our forum or by email), our support assistant opens the pages of that shop they point us to, the way a support agent would in a browser: a product page, the cart, the checkout. It reads them to understand the problem and takes screenshots for the support ticket.
Every request is signed with Web Bot Auth (HTTP Message Signatures, RFC 9421): the Signature-Agent header names https://agent.hikashop.com, and the public key is at /.well-known/http-message-signatures-directory. It browses from 51.254.213.175 and 2001:41d0:305:2100::1:66df.
Block the signed agent "HikaShop Support Agent" in your Cloudflare bot settings, or the addresses above. Questions: contact HikaShop.