"Back in the diner after a lovely 2 week break," she wrote.
One fan wrote: "Good you are back."
Another added: "Great to have you back on set!"
The beloved soap star spent some time lapping up Western Australia, including a visit to some wineries and a helicopter ride around Swan Valley.
Lynne has played the character of Irene for almost 26 years, and last year revealed she has no plans to quit any time soon.
The 66-year-old told News.com.au: "As long as I have the energy, fitness, memory and enthusiasm, and the love for it, I'll stay as long as they'll have me."
In June 2018, the age-defying actress revealed she had got a second tattoo at the age of 65.