Let's Encrypt - No Longer Recognized as "Known Bot"

Noticed that automatic certificate renewal failed for the first time in quite a while. Digging into it, I found that my firewall rule allowing through "Known Bots" was now blocking Let's Encrypt. I can create an exception in this rule specifically for LE, but then it is also blocked by "Bot Fight Mode" (free version). There's no way I see to disable (non-super) Bot Fight Mode using a custom rule or such, it is either on or off.

What needs to occur for Let's Encrypt to get back on the "Known Bots" list. Is this something LE themselves have to report to Cloudflare, or does Cloudflare maintain a list themselves?
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