Quite a large thread on Masso. No solution yet but hopeful a solution will come soon. Please chime in at Masso.
https://forums.masso.com.au/threads/masso-link-bug-stuck-connecting.3427/page-3#post-28210
It seems @masso has found the issue and it’s software related and will be part of future software update. Onefinity does not have any more information about this issue or when the fix may be released.
https://forums.masso.com.au/threads/masso-link-bug-stuck-connecting.3427/post-28513
I’ve got the (probably) same thing happening - after working for some period of time masso link drops the connection - will check next time it happens to see if wifi is down after it happens. Glad to see there is a fix in the works.