This has happened with me as well. I was running a solo flawless. After the boss was below 50% (she probably had 40% left), I noticed when I activated deepsight that the green lines forming the triangle, between the three platforms you must kill the Knight from, were no appearing. I was able to deduce which three platforms/body parts were to be activated because the dark sphere was still present. I did the mechanic as normal, and the symbols spawn as normal. I even made sure that symbol I was picking it up first, was the one of Oryx’s right knee. I found the matching symbol in one of the water caves, did everything as normal. Finish the lucent hive, made sure was indeed the correct symbol for the 3rd time. Came back out. Activated deepsight and went to deposit. No button prompt to deposit appear. I tried holding so see if maybe the text wasn’t showing, still didn’t work. I even activated deepsight a second time and try to deposit again, without success, just to die to the timer and fail my flawless run. Needless to say the frustration I felt after being in it for approximately 2hrs. Just two more phases and I was done. This needs to be addressed.