We are not properly preserving the state of task and topic filters during the onboarding experience.
So far so good. Now, I open the topic filter:
My topic is not listed, and if I press "Done" the filter is unset.
Same issue with the task type filter, my selection of "Copyedit" has disappeared:
Note that if you make a topic and task type selection during onboarding, and *do not* interact with the topic/task filters, and then visit Special:Homepage
again, the selection you made in onboarding is preserved. So there is probably a relatively quick fix to be made when the dialog is opened during onboarding to check if initial settings exist, and if so, to respect those instead of overwriting them.