wlf with gosub and lookup behavior

[Scott Nelson]

have dummy fields on a screen with a path
do wlf on first field, with a browse lookup using @sk to select a line, 
fill another dummy, return and fill the screen dummy, then end. it won't 
end after the wlf.  cursor goes back to the dummy field.

if i comment out the browse lookup or enter a value and do not do the 
lookup, then the end works, and the cursor goes to the next field.

sco 5.07 and fp 5.0.14

this behavior is not the same on other sco systems.

any ideas?

baffled, dazed and confused.