Mermaid charts are loading irregularly

[scali]

Quite same as #1443, but a bit different

Going to kroki.io and to samples of Mermaid chart. Going to the link of the diagrams directly (Sequence Diagram or Gantt) :

For example, this link :
https://kroki.io/mermaid/svg/eNpljzFuwzAMRXefgtlrZzcKBymCtMjQoTegZdYiwoqqTLfw7SMrSDKEi4j_H6nPaqLfmYKjA-OY8KeCXBGTseOIwWAv7OhJfdO-aMWtu5P60MIHiSis_Qt4_QdMBIvOu0KKaswEinnnyZ2LuNbK3zYcefQGOCKHycAvUZ3XMCTGglMYyvupRpAKq99wHf1CYw0oYF7n7Ezw2qdtFxP9IUvTNNX9s7orsVt4T4S2eRhdPiufsUbvdbZH-KzXt4wnFVlgVB021QUIImOl

took from the offical page of exemples of kroki.io

The link loads irregularly, and when it failed, there is this message :

Convert plain text diagrams to images !
🤖 bip... bip... something wrong happened!
400 Error: An error occurred while converting the diagram

I'm using kroki to load images in a asciidoctor/antora document and have the same kind of error :