Tailplane Tanks
A similar problem occurred when a rather long aircraft with a tailplane tank was introduced. Under certain circumstances there was no gravity feed from the tail to wing tanks at all.
A full-size ground test rig was built using a combination of aircraft parts and transparent tubes. This rig allowed a variety of angles of attack & altitudes to be simulated by virtue of a tilting frame and the tanks being connected to vacuum pumps.
Two problems were identified. Firstly, when the transfer pipe was opened, the fuel instantly degassed from sea level to whatever altitude was simulated, resulting in very sudden airlocks.
The other problem was that the shape of the exit from the tailplane tank to the transfer pipe caused cavitation, which resulted in what transfer that did occur to go in a series of 'slugs' of fuel.
The shape of the waves on these 'slugs' would have been a surfer's dream!
As far as I recall, a number of changes were made to components and operating procedures to overcome the problem.