In KMM 4.8.1, once i successfully completed any account reconciliation process, the KMM window would revert to the standard ledger view for that now-reconciled account [once i closed the popup reconciliation report window]. 

In v5.0 that view-reversion does not occur, for 100% of the times i have done reconciliation in v 5. Instead a broken [or maybe "empty" might be a better description] reconciliation view remains on-screen [once i close the popup reconciliation report window], usually now with no entries. My workaround is to leave Ledger-view altogether [eg, back to Home], then manually return to the Ledger, which then behaves correctly. Not always, but sometimes, this workaround causes KMM to crash.