Async Mode results in "network error" when many lcb_get() calls are made without use of lcb_wait() within loop

Am receiving "network error" back from error callback when using lcb_get() within a loop, within a function, in libev async mode
(regardless if I make 1 call with a long command list or many calls of 1 command each) after returning control to the
event loop (ie; return back from this function).

If I add an occasional lcb_wait() during some interval of calls before returning back, then this does not happen but, of course, I am blocked
during this call so that is not really a solution.

Appears to be event overflow related but not sure. We are not talking about millions of calls, maybe 100k-ish over the network,
not loopback.