Saresh - Mirage Boss Bug

My Saresh dissappeared mid-fight and then never showed up again, I waited like 10 mins but nothing happened. There is still 1 monster remaining in my map but boss is nowhere to be found. I attached a screen record video here for proof.

https://drive.google.com/file/d/1qN2UWubPtYpCsUY9eExxaRyqBEXRy_O1/view?usp=drive_link

Please take a look. The map alone costs me over 400 chaos :(

It happened again, this is the second time for me

https://drive.google.com/file/d/1IPGDHOIz2A80vlslkj-i_riL2_Uiw_4i/view?usp=sharing

Please fix GGG