Sounds crazy to me I own 2 the 19L and the 30L and never have this problem. I whirlpool in the kettle for 20 mins . and let it rest for 45 minutes.
I transfer to the Speidel only clean wort and no trub. I actually tilt the Speidel towards the spigot to get every last drop. I think the whirlpool...
All my beers I do not see a need for a second vessel. Pitch and ferment in one vessel when fermentation is done its done. I dry hop in the primary when fermentation is 70-80% done leave for a week and keg.
This is the Tasty McDole method and I like it a lot.