Opening vault on another device resets to default theme

I have a vault that is synced with Obsidian Sync between my Mac M1 laptop (Obsidian v0.16.2), iPad and Android phone (both Obsidian v1.3.1). I use the Minimal Theme and just in the last two days am experiencing the following behaviour:

When Obsidian is running on my laptop (which it is 99% of the time), if I open it on either of my other two devices it resets to the default theme on my laptop. In the Appearance settings the Minimal theme is gone and I have to re-download and install it.

I’m attaching the Sync log from my laptop, which shows the Minimal theme files getting deleted. At first the Sync settings (for all devices) “Appearance settings” and Themes and Snippets" were both on; I’ve turned off “Appearance settings” but it still happens.

Has anyone else experienced this or know how to fix?

Sync log:

2022-09-08 16:35 - Connecting to server
2022-09-08 16:35 - Connection successful. Detecting changes...
2022-09-08 16:35 - Fully synced
2022-09-08 16:35 - Server pushed (deleted or renamed) [John's Galaxy S20 5G] .obsidian/themes/Minimal/manifest.json
2022-09-08 16:35 - Deleting .obsidian/themes/Minimal/manifest.json
2022-09-08 16:35 - Accepted .obsidian/themes/Minimal/manifest.json
2022-09-08 16:35 - Fully synced
2022-09-08 16:35 - Server pushed (deleted or renamed) [John's Galaxy S20 5G] .obsidian/themes/Minimal/theme.css
2022-09-08 16:35 - Deleting .obsidian/themes/Minimal/theme.css
2022-09-08 16:35 - Accepted .obsidian/themes/Minimal/theme.css
2022-09-08 16:35 - Fully synced
2022-09-08 16:36 - Server pushed [John's Galaxy S20 5G] .obsidian/plugins/obsidian-checklist-plugin/styles.css
2022-09-08 16:36 - Downloading file .obsidian/plugins/obsidian-checklist-plugin/styles.css
2022-09-08 16:36 - Downloading complete .obsidian/plugins/obsidian-checklist-plugin/styles.css
2022-09-08 16:36 - Accepted .obsidian/plugins/obsidian-checklist-plugin/styles.css
2022-09-08 16:36 - Server pushed [John's Galaxy S20 5G] Projects/Archived/Byta/Byta.md
2022-09-08 16:36 - Downloading file Projects/Archived/Byta/Byta.md
2022-09-08 16:36 - Downloading complete Projects/Archived/Byta/Byta.md
2022-09-08 16:36 - Accepted Projects/Archived/Byta/Byta.md
2022-09-08 16:36 - Fully synced
2022-09-08 16:36 - Server pushed [John's Galaxy S20 5G] .obsidian/plugins/obsidian-excalidraw-plugin/main.js
2022-09-08 16:36 - Downloading file .obsidian/plugins/obsidian-excalidraw-plugin/main.js
2022-09-08 16:36 - Downloading complete .obsidian/plugins/obsidian-excalidraw-plugin/main.js
2022-09-08 16:36 - Accepted .obsidian/plugins/obsidian-excalidraw-plugin/main.js
2022-09-08 16:36 - Fully synced