I would guess you have an Edelbrock/Carter carb ? Same thing with all of my Edelbrocks. Not sure why but I assume it has to do with the jets being in the floor of the carb .
Don’t seem to have the issue with my Holleys .
It has the original TQ, which I was hoping would stop this with the composite center section. But no luck. Thanks for the pump suggestions, I'll install one.