Flamingo makes CF7 submit very slow

I’ve got a client using CF7 with flamingo and they were complaining that the form submit was taking 10-30 seconds and they were losing leads as a result.

I spun up a new test site – clean version of the latest WordPress and installed just CF7 + Flamingo and saw the same results.

I disabled flamingo and CF7 now submits almost instantly.

Please consider this a showstopping bug as no client I know would have this sort of delay on their contact forms.