Three of MK Dons' loanees were in action for their respective loan sides during the latest round of league fixtures.
Walker retained his place between the sticks as Chelmsford City hosted Concord Rangers in their latest National League South outing.
Decarrey Sheriff put Concord Rangers ahead from the penalty spot before Tom Wraight levelled shortly before the break.
The draw leaves Robbie Simpson's side 10th in the table.
Elsewhere, Finn Brennan played 90-minutes as AFC Dunstable were beaten 3-0 by Kidlington, while Jamal Sule and Wantage Town were defeated 7-1 by Corby Town.