iOS and iPadOS 13.2.3 have been released with bug fixes, including for Messages.
Update iPhone and iPad So this update focuses on bug fixes, while the 13.2.2 update addresses the major problem that apps were not kept alive long enough during multitasking.
UPDATE NOW: This iPhone update is so important that we give iPhone 11 Pro Max 9 out of 10
However, the bug fixes are important in themselves, including potential problems with Mail not retrieving new messages and the universal system search to find content in Mail, Files and Notes not always working until 13.2.3.
Fixes an issue where system search and search within Mail, Files, and Notes might not work
Addresses an issue where photos, links, and other attachments might not display in the Messages details view
Fixes an issue that could prevent apps from downloading content in the background
Resolves issues that may prevent Mail from fetching new messages, and fail to include and quote original message content in Exchange accounts