When attempting to open the Collections panel from Panels>Collections, the editor instantly crashing, no window/panel opens. Win10 128GB RAM Nvidia 3090 Let me know if I can provide anything else to help squash this bug! 
Here's the crash log:
-------------------------- Pixel Composer 1.18.2.1 Crashed -------------------------- ERROR in action number 1 of Draw Event for object o_dialog_menubox: array_get :: Index [23] out of range [21] gml_Script_variable_instance_set_struct -------------------------- STACK TRACE -------------------------- gml_Script_variable_instance_set_struct (line 4) gml_Script_dialogPanelCall (line 26) gml_Script_panelAdd (line 142) gml_Script_call_panel_Collection (line 486) gml_Object_o_dialog_menubox_Draw_64 (line 98) -------------------------- Device Info -------------------------- Version: 1.18.2.1 (118010) Operating system: Windows (655360) ------------------------------------------------------
Further investigation reveals that this is happening only in some layouts! Most prominent is the default/Vertical layout. Switching to Side Menu, and then attempting to open the Collections panel, no crash occurs and the panel opens as expected.