Not sure if this is a known issue or not, but I didn't see a report for it after a quick search.
It is possible to embed the flag into the underside of a horizontal surface, "sticking" it there. Can be reproduced by firing the rocket launcher point-blank range at the underside of a bridge (etc) and killing yourself, when holding the flag. The flag can still be picked up as normal after it has been stuck.
Reproduced this on Forgotten and Moonshine.

It is possible to embed the flag into the underside of a horizontal surface, "sticking" it there. Can be reproduced by firing the rocket launcher point-blank range at the underside of a bridge (etc) and killing yourself, when holding the flag. The flag can still be picked up as normal after it has been stuck.
Reproduced this on Forgotten and Moonshine.
