Nindaeril's Perch, bosses never appearing

Prof_Bawbag

I can't get the clear because both tigers never appear. I'm been there umpteen dozen times and waited for an age just in case someone (highly unlikely) was always killing the bosses those several hundred times I've went back and forth to this area. This has been the case for weeks now. If I go to the area on other toons, the bosses are there each and every time, but on my main, nope, no dice.