http status 400 ("Invalid HS descriptor. Rejected.") response from dirserver Malformed hidden service descriptor?

Hello,

my ephemeral hidden service, created via controller through txtorcon gets rejected, sometimes and sometimes not. Very unreliable services. Can please help find why tor tries to upload malformed hidden service descriptor? Can I dump the hidden service descriptor of MY own service somehow to find out what may be wrong or nor or the dirserver malicious? For which reason can it be rejected if not too large?

[notice] Tor 0.4.8.16 running on Linux with Libevent 2.1.12-stable, OpenSSL 3.0.16, Zlib 1.2.13, Liblzma 5.4.1, Libzstd 1.5.4 and Glibc 2.36 as libc. [warn] {REND} Uploading hidden service descriptor for service ***: http status 400 ("Invalid HS descriptor. Rejected.") response from dirserver B34D07BFCBBF179CD6D0F440293A17778893EB76 at 198.24.164.98:443. Malformed hidden service descriptor?