Apple released iOS 13.2.3 today along with iPadOS 13.2.3. It has bug fixes for Messages, Mail, and other improvements.
iOS 13.2.3 Release Notes
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
You can update your devices by going to Settings > General > Software Update.