The Trial of the Sekhemas - Hourglass Trial Bug

I've been farming Sekhemas for a couple of days now, trying to farm The Last Flame incence relic. I got really expensive relic setup for this kind of a farm, and everyone who is farming sekhemas know what im talking about. Total of 9 relics, 6 seal and 3 urn with 10% movement and 20% relic found modifiers. And with all of that speed of light going throught the sekhemas trial you will came a cross a Hourglass Trial and you will take it sometimes cause it contains, at the end, the merchant or anything other usefull. It last's for 90 seconds in total, or 1.5 min. You can shorten that duration by killing rare monsters and you can quite often finish it withing 15-20 seconds. But it started to happen often lately that it wont spawn rare monsters at all, or it just spawn's 1 or 2 and then stops and you have to wait whole minute or even a total of 90 seconds just to finish it and go through. It's probably not a big deal, but when you are fishing for a 0.3% relic drop and you maybe have to do more then a hundred trials for it to drop, it gets really frustrating and anoying having to wait cause of a bug.