Access 2608 Build 20326: Line controls disappear in Print Preview

Your clean MDB reproduction, two affected 16.0.20326 builds, multiple printers, and immediate success after rollback strongly isolate an Access 2608 rendering regression rather than report design or a printer driver. Since Rectangle controls still render, use a thin rectangle with no fill as a temporary substitute for each Line control, and verify Print Preview and exported PDF output. Keep the minimal MDB and record the affected and known-good builds. Install the next Current Channel update when available and retest before redeploying; avoid leaving machines pinned to an old build longer than necessary. In Access, submit Help > Feedback with diagnostics, the sample database, reproduction steps, and screenshots. If the reports are business-critical, have the Microsoft 365 administrator open a support case and provide the same artifacts. Microsoft must confirm the defect and servicing fix, but your evidence is strong enough to avoid redesigning the database.