Multiplex is understood to have been unpaid for months by Chinese client R&F One (UK) Ltd.
The brakes have been put on progress by the issue but the client and contractor have now issued an update in a joint statement.
It said: “R&F Properties and Multiplex are working together to deliver One Nine Elms, with a program of works continuing to take place on site, returning to full capacity shortly.
“We remain fully committed to jointly and successfully completing One Nine Elms, an exciting new destination in London.”
Work on the site involves construction of two residential towers of 56 and 42 storeys which are due for completion in early 2023.
R&F bought the job from former Chinese developer Dalian Wanda in 2017.
Its parent company Guangzhou R&F Properties has been struggling to make a $725m bond repayment.