Members showing in LCR, but not in Tools

Our branch was recently formed out of a split from the ward we were in before. After the split, all the member's records were moved to the branch, and we could see everyone in both LCR and the Tools app. Now, something has happened and our YW President, Branch 2nd Counselor, and a few others don't show up at all in the Tools app, though I can still see them in the LCR. Any thoughts on how to fix this? Syncing the app hasn't helped.

Note: I'm the Branch Clerk.

Are the records for those members (young women president, branch presidency counselor, etc.) in the other ward?

No, they were not showing up in any of the other units in the stake. I did, however, get it to show them after I uninstalled/reinstalled member tools.

We have had numerous issues with Tools in our Ward and the best solution has been to uninstall and reinstall the app. I've seen it on Android and IOS so it makes no difference which operating system they are using.

I know that this isn't a solution per se, but I was having a similar problem and after uninstalling and reinstalling the app it was fixed.