In the beginning there was the Deal, and the Deal was stupid.
Nobody seems to know for sure who actually "negotiated" the JLN side of the confidence and supply arrangement with the Rockliff Government but, for whatever reason, the three elected JLN MPs signed it. The Deal so needlessly limited the JLN MPs in terms of their ability to vote against the Government that when they broke the Deal by voting for a doomed Greens motion to compel the Government regarding its coastal policy, the Government either didn't notice or ignored the breach and it took the Labor Opposition to point it out. (Edit: The Government then claimed the Deal hadn't been broken when it had, which soon resulted in the JLN MPs breaking it again on a motion re Forest Reserves.)
Tensions were apparent within the JLN from early on with Rebekah Pentland and Miriam Beswick having one approach and Andrew Jenner another. Staffing was one issue where this came to a head. There were further problems in early July when it emerged that the three state MPs had sent Jacqui Lambie a letter in June insisting she keep out of Jacqui Lambie Network state business, and alleging that she was directing state MPs on how to vote.
The catalyst for yesterday's events was the recent news that upgrades to the Devonport ferry terminal, needed for the overdue replacement for the Spirit of Tasmania ferries, had been bungled. Lambie issued a release on August 15 demanding that Treasurer and Minister for Infrastructure Michael Ferguson resign. On 19 August JLN MP Andrew Jenner made comments that Ferguson's position was "untenable".
On 20 August Lambie seems to have issued a press release - the verbatim text of which I have not seen because the Jacqui Lambie Network is beyond hopeless at publishing its output - saying that if Premier Rockliff did not sack Ferguson she would rip up the government's confidence and supply arrangement with the JLN. This was bizarre to say the least since Lambie herself was not a signatory to the deal which, whoever drafted it, is between the government and the individual JLN MPs.