Leinster fans were banned from bringing their supporter flags into Bath's home ground the Rec creating a bizarre sideshow ahead of their Champions Cup match.
The official Leinster supporters club (OLSC) posted an angry update on Twitter ahead of the match, revealing they were not allowed to bring their usual flags into the game.
Bath's reasoning for banning the flags was that they failed the health and safety test, something that the travelling Irish fans were bewildered by.
The OLSC posted on Twitter advising fans of the news pre-match, writing: "We brought 1500 flags over (for) today's game and @bathrugby are refusing to let us distribute them. They are saying that the flags failed a health and safety test.
"These flags have been passed as safe by Airports and stadia all over the world.
"We would like to apologise to supporters for this disappointing news. We did everything we could to get the flags from Bath but they wouldn’t release them."
.@leinsterrugby supporters: We brought 1500 flags over today’s game and @bathrugby are refusing to let us distribute them. They are saying that the flags failed a health and safety test. pic.twitter.com/wNxZxMfTey— Leinster Supporters (@OLSCRugby) December 8, 2018
Bath responded on Twitter with a statement about the flags.
"We’re really sorry - the flags were tested against three safety criteria & failed all three including fire," the post read.
"We have to take safety seriously, but we realise it’s disappointing. We’re really looking forward to the game & we know you’ll bring the noise to the Rec today."
Bath's supporters had no such issues with their flags, with the club saying they met the safety standards.
"Yes - our flags pass all the tests. Safety for all supporters is paramount," the club wrote in response to a question about the decision.
Flags or no flags, it didn't worry the visiting Leinster side who took a 17-10 win over the English team in their European pool match.
Leinster sit second in their group midway through the preliminary stages, behind French side Toulouse.