4.5.0 - issue with layout editor fonts and layout preview

We updated our Xibo CMS (running on ubuntu/docker) yesterday from 4.2.2 to 4.5. After updating, I noticed that when I went to check our layouts in the editor, the fonts did not appear to display correctly in the text widgets. I see 5 listed (Aileron Heavy, Regular, Dancing Script, Linear, Railway). Toggling between them makes no visual difference in the editor.

Additionally, our layouts use an embedded Google Slides url. I noticed that when I click the “preview layout” option in the CMS, I get a black box error showing “parts of this slide didn’t load, try reloading”.

In the previous version of the CMS, I did not experience those font issues, and I was able to see the embedded slide show in the preview. This seems to only affect the CMS, and when I tried adding a new display to our CMS this morning, the client shows the correct font choice and plays the embedded slides fine. What should we do to try troubleshooting these issues?