The problem seems to be caused by the new functionality introduced in version 6.x – auto-convert of copy/pasted Google Maps links into embedded Google Maps: https://techtime.co.nz/display/TECHTIME/Save+some+brain+power+-+Google+Maps+for+Confluence+is+now+easier
For an immediate fix/workaround this particular functionality can be disabled in UPM:
- find TechTime Google Maps Embedding Macro app record, open that up
- locate a list of modules (should say 9 out of 9 enabled), open that up
- locate the module "Autoconvert google maps urls" and disable that one.
This will stop auto-convert copy/paste functionality, but the map functionality for the already existing maps and ability to insert new ones by explicitly inserting the macro – will continue to work.