Base member value is not rolling up to Child Parent & Top Parent

A bit of advice, use the default cell shading when troubleshooting, it tells you a lot.

You're dealing with an asset account. It isn't possible for you to have periodic 0 and YTD 500k. So most likely, one of those numbers isn't really being stored in the database(granted, applications can really break the box sometimes, but as far as I know, that's impossible).

If you turn on default cell styles and hit refresh, do you get both values as the same color? If one of them is a dark yellow, that means it isn't stored and is recognized as a change vs what is stored. For example, if you have formulas attempting to load the data there, they will display your formula value instead of pulling from the application. If you still have an issue, I would go a step closer to the truth and use a data grid over the web. Ultimately one of those numbers should reveal itself as false and if not a screenshot from there will help much more than the adhoc.

In particular, it looks like your YTD value is the one that's really in the application though.