sometimes doesn’t work with Cloudflare

Sometimes it happens that the plugin does not work with Cloudflare.
Writes that 10 seconds have passed and there was an unexpected server response.
There is no logic in this, it just does not work and that’s it. No convenient solutions exist, the option to insert a unique ID each time is not suitable, because then page caching does not work and the meaning of caching is lost. Attached is the result of the post:
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Not expected HTTP response:Status-Code: 447
Date: Wed, 04 May 2022 12:29:27 GMT
Content-length: 0
Cf-cache-status: DYNAMIC
Expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
Report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=wGj7osZFcxm78SsUsBjPhK11d7BIMeJrYvRo4JaFgA%2FXuV4K92Gn0IITTrpLXgm%2BeN8YIWyIk0jTPQF4Yxiq4CYaMqpFWGAnXk97D%2Fyk8LAKXOiSODPzXprRS3mVDueQNUIIXy%2FGr%2FrPYDivS%2Fo%2FG4xREg%3D%3D"}],"group":"cf-nel","max_age":604800}
Nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
Server: cloudflare
Cf-ray: 70613df7384c5a19-MXP

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this problem has been around for several years. Some solution is needed. None of what I have seen before is suitable, because it is not effective. What does the unexpected answer mean – it is not clear.
Some kind of clarification, because this error occurs on larger sites.

The page I need help with: [log in to see the link]