A disagreement seems to have emerged between The Green Party and Fine Gael over re-negotiating the programme for government.
Deputy Green Party leader Catherine Martin said she wanted to see a re-negotiation happen before Leo Varadkar is due to return as Taoiseach in December 2022.
However, Mr Varadkar has shot this idea down.
The deal has gone to party members for their consideration.
But Kevin Doyle, group head of news at Independent News & Media, told Newstalk Breakfast it is not plain sailing.
"There are cracks emerging all over the place in terms of how the three parties are working together and even within the parties themselves.
"The idea of re-negotiating the programme for government in December 2022 came as a bit of a shock to Fine Gael yesterday and to Fianna Fáil as well to some extent.
"But the Taoiseach was quite clear that that is not the plan, that is not in there.
"And even making the point that when they agreed the confidence and supply with Fianna Fáil back after the 2016 election, that there was mechanisms in there and it was in black and white that there would be reviewed at various points.
"And if you remember that deal was originally for three years, and obviously we got over four out of it in the end.
"So there is a question mark there around where Catherine Martin came up with the idea.
"Was it raised during the actual negotiations itself, or is this something she just announced as part of that Green Party conversation that took place this week."
"It is a problem, I think, because now Catherine Martin is going to have to decide whether she is OK with that - or whether she is going to be walking back her statement.
"That is a problem for her within her own party - but there are all sorts of other problems.
"There's a row over the M20 between Cork and Limerick, which has been long promised and people thought was eventually going to happen - but now there's a suggestion from The Green Party that it's not.
"There's a row over the liquified gas plant in Shannon with Fianna Fáil, and even Paschal Donohoe yesterday suggesting they'd still be fighting for that; but The Greens saying that is not part of the plan.
"So there's lots of local rows already developing, and it does make for a difficult week ahead I think for The Green Party as they try yo get the numbers on board.
"Trust is a huge part of this".