Msg fetching bug with push enabled when using server search function

Checklist

• I have used the search function to see if someone else has already submitted the same bug report.
• I will describe the problem with as much detail as possible.

App version

6.400

Where did you get the app from?

None

Android version

ANDROID 10 - LINEAGEOS 17.1

Device model

klte

Steps to reproduce

0. Enable push fetching on the folder where to search.
1. Search for message that are locally stored and some only on server
2. Hit the server search button
3. Open one or more unread messages

Expected behavior

UI view staying on the openned message.

Actual behavior

UI view goes back by itself to something looking like locally searched messages list 1-5s after I start to read the message.

But the UI sometimes also retain some of the server messages.

The button to do the search does not come back. Have to come back, then search again locally, then on server.

Logs

https://pastebin.com/TPrRTRaz

Reproduce this on Android 10 with push fetching enabled, using the listed steps to compare locally stored and server-only search results. Review the linked logs while opening unread server-search messages; done means the view remains on the opened message, retains the expected results, and the server-search button remains available.