You can’t; if you try to go to https://community.cloudflare.com/ you will get the same infinitely loading page that @throwaway69 mentioned above.
It seems to me that an established and wellknown public company stands a better chance of contacting cloudflare and enacting change than any of us Joe Randompersons, who to cloudflare are just the next scammer trying to get unblocked. Jolla might already use cloudflare for e.g. the jolla.com or sailfishos.org domains, in which case they could use their existing contract to raise a support case.
However, even if we could, as outlined above by @direc85 this is really a problem with the browser itself. It is either doing something it shouldn’t do, or failing to do something it should do. As the creators and maintainers of the browser (specifically this one built into the OS itself) it should fall to Jolla to address problems with their for-money product.
A good first step would be to acknowledge that there is a problem by removing the false ‘fixed’ tag and adding this to their official tracker instead @flypig .