Code snippet that reproduces the problem

Broken: https://phpstan.org/r/3b193843-1ecb-4653-b1e0-fee1803e50ee
Working: https://phpstan.org/r/bc2bc687-5de6-4a50-9f2f-9913994c2b37

The only difference between these samples is the placement of the line /** @var \ReflectionClass<MyEvent> $paramClass */.

Placing any other code in place of the try/catch seems to work as expected (ex: https://phpstan.org/r/6cd10b0f-e7da-4784-b3de-0806369a8440)

Expected output

Both samples should report no errors.