Guild Wars 2

I am having this problem recently. From 2 days in a row I got only 3 chests from Tequatl instead of 4 (missing the yellow one). Also, I just killed Jormag and no chest at all for me.
Before you ask, I do these bosses only once a day and do a lot of damage, so no reason for the chest not spawnming for me.
Anyone having the same issues?

There is DR if you only do a world boss on a particular character and nothing else inbetween attempts. So if you have one character parked at Teq and do not do anything else with it, you’ll eventually encounter that DR. Many players have also seen this with Rhendak in Diessa.

Ty for the advice. I did some minor events with the chars before the boss. I will try change map to see if it works.
I forgot to mention: I didn’t get the chest after killing Cobalt also, but aparently it is a problem for most of the players or a bug.