Error 83011 while using Certbot

Getting error 83011 Total record size limit exceeded when I try renewing & re-issuing wildcard cert of one domain registered in Cloudflare, using Certbot.
The certificate was renewed using dns-Cloudflare challenge 2 month ago without any issue.

The problem even persists if I try to register TXT record manually, via web console, so it seems like the problem is caused on Cloudflare’s side.

Record tried to add is:
_acme-challenge.<domain name> TXT <43 bytes ascii string>

and found that web console accepts adding record with content up to 21 bytes string.

There are 13 other records registered in the zone, so it seems like it’s not related to max record count limit of free tier.

Any help is appreciated, thanks in advance.

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