I find that condensing removes the trill extension line and cannot understand why.
The workaround is to open the condensed version in galley view and manually add the extension lines again, however, there may be a better solution.
Test2.dorico (1.7 MB)
You can activate the trill line property in Engrave Mode:
It looks like trill line is one of the properties that condensing doesn’t keep automatically.
I tried on your file to set the trill line as default in Engraving Options (i.e. without needing to activate the property), and it does appear in the condensed staff.
