see all button missing when grouping tasks by project in tasks tab

[hthabti]

7.0.x
6.5.x
steps:
from app center open tasks app
create project1, project2 & project3
in project1 create 15 tasks, in project 2 create 5 tasks and in project3 create 3 tasks and assign all these created tasks to yourself
go to tasks tab and select "assigned to me" from quick filter drop down
click on filter button and select "project" in "group by"
actual:
project1 & project2 tasks are listed but there is no see all link from below to load the tasks of project3
(the behavior occurs also if we regroup by any other option, labels for example)
expected:
see all button should be displayed  below if not all results are retreived