ErrorException #1 reported

Dear All,
I have a problem with CI4 that I didn't have in CI3.
Occasionally, the details of some of my errors are not properly propagated/escalated to CI, and only a generic ErrorException is displayed.

ErrorException #1
Allowed memory size of 134217728 bytes exhausted (tried to allocate 65015808 bytes)
APPPATH\Views\errors\html\error_exception.php at line 96
{PHP internal code}  —  CodeIgniter\Debug\Exceptions->shutdownHandler ()

This is obviously totally useless for debugging.

How can I get more details about these errors?

PS: I guess this is only the case with "compilation" errors.
for example: just remove an import at the top of your code to reproduce this error