Rai has released a statement on the matter:
"Rai specifies that it was a technical problem following which some data - completely partial - were mistakenly highlighted in the graphics of the Italian vote."
"Rai promptly apologized to the EBU leaders and believes that this inconvenience does not affect the regularity of the final result. The published votes are in fact incomplete."
More:
https://www.rai.it/ufficiostampa/assets/template/us-articolo.html?ssiPath=/articoli/2024/05/ESC-2024-inconveniente-tecnicoESC-2024-inconveniente-tecnico-784b900c-ca7f-47e6-9a41-1e2af801ada8-ssi.html
https://mastodon.social/@byJannik/112413257847793402
RAI Ufficio StampaESC 2024, inconveniente tecnicoDati pubblicati incompleti, Azienda si scusa con EBU