Upgrading from 0.74.3 to 3.10.0 and now text showing as crazy characters in APP and web



I had a tech upgrade our rocket chat from the ancient:
Version 0.74.3
Apps Engine Version 1.4.0

Version 3.10.0
Apps Engine Version 1.21.0-alpha.4235

Since then, on some machines only, but more than 50%, the APP and web version of rocket.chat shows crazy characters. If you copy the characters and paste into notepad, original message appears, so seems to be some kind of weird font issue.

The tech is not sure where to proceed to fix this, and I am wondering if anyone can point me in the right direction to get this resolved.

Server Setup Information

  • Version of Rocket.Chat Server:
  • Operating System: ubuntu
  • Deployment Method: docker
  • Number of Running Instances: 1
  • DB Replicaset Oplog:
  • NodeJS Version: v8.10.0
    Version 3.10.0
    Apps Engine Version 1.21.0-alpha.4235
    Database Migration 212
    Database Migration Date January 5, 2021 3:43 PM
    Installed at July 11, 2017 11:18 AM
    Uptime 12 days, 17 hours, 29 minutes, 13 seconds
    Running Instances 1
    OpLog Enabled

Date Tue Dec 29 01:43:25 2020 -0300
Branch HEAD
Tag 3.10.0
Author Diego Sampaio
Subject Merge pull request #19982 from RocketChat/release-3.10.0

Runtime Environment
OS Type Linux
OS Platform linux
OS Arch x64
OS Release 4.15.0-74-generic
Node Version v12.18.4
Mongo Version 4.0.16
Mongo Storage Engine mmapv1
OS Uptime 12 days, 19 hours, 11 minutes, 18 seconds
OS Load Average 0.19, 0.15, 0.15
OS Total Memory 3.49 GB
OS Free Memory 314.84 MB
OS CPU Count 1