Steps to reproduce:

Open Console window
Click "Clear" button arrow symbol and enable "Clear on Recompile"
Open Window -> Package Management -> Package Manager
Click "+" button in top left corner
Select "Install package from tarball.."
In OS pop-up select attached tarball file 'com.testpackage.invalidtrust-0.1.0.tgz'
Wait for "Invalid signature" modal window to open
Click "Install Anyway" button
Observe the console

Actual results: console is empty

Expected results: clearable error message should appear with text "Package '<packageName>' has an invalid signature. For more details, check the Package Manager window (Window > Package Management -> Package Manager)."

Reproducible with versions: 6000.3.14f1, 6000.4.4f1, 6000.5.0b5, 6000.6.0a3

Can’t test with versions: This feature was introduced in 6000.3.0a3

Tested on (OS): Ubuntu 24.04, Windows 11, Mac Silicon

Notes:

Works as expected when 'Clear on Recompile' setting is disabled
Same scenario with package that has missing signature works as expected (only difference is that errors message is replaced by warning message)