How to solve the subview tree crash? Is the max subviews count 63?

I have meeted an odd crash just in macOS 10.15, when I'm developing a video player using NSView.What's more, I use OpenGL and Metal and have the same crash stack.I developed the app by qt but I'm not familiar with NSView,so I need someone give me advice to sovle the crash.
assertion failure: "(self)->enumeratingSubviewsCount < ((1 << 6) - 1)"0 libsystemkernel.dylib 0x00007fff644ceada abortwithpayload + 101 libsystemkernel.dylib 0x00007fff644d04eb abortwithpayloadwrapperinternal + 802 libsystemkernel.dylib 0x00007fff644d051d abortwithpayload + 93 libsystemc.dylib 0x00007fff6443ca1b oscrashfmt.cold.1 + 554 libsystemc.dylib 0x00007fff643cf8ef oscrashfmt + 1545 com.apple.AppKit 0x00007fff2a18982e -[NSView buildLayerTreeWithOwnLayerRequirement:someAncestorWantsLayer:] + 40916 com.apple.AppKit 0x00007fff2a188c90 -[NSView buildLayerTreeWithOwnLayerRequirement:someAncestorWantsLayer:] + 11177 com.apple.AppKit 0x00007fff2a188c90 -[NSView buildLayerTreeWithOwnLayerRequirement:someAncestorWantsLayer:] + 11178 com.apple.AppKit 0x00007fff2a188c90 -[NSView buildLayerTreeWithOwnLayerRequirement:someAncestorWantsLayer:] + 11179 com.apple.AppKit 0x00007fff2a188c90 -[NSView buildLayerTreeWithOwnLayerRequirement:someAncestorWantsLayer:] + 111710 com.apple.AppKit 0x00007fff2a188c90 -[NSView buildLayerTreeWithOwnLayerRequirement:someAncestorWantsLayer:] + 111711 com.apple.AppKit 0x00007fff2a188c90 -[NSView buildLayerTreeWithOwnLayerRequirement:someAncestorWantsLayer:] + 111712 com.apple.AppKit 0x00007fff2a188c90 -[NSView buildLayerTreeWithOwnLayerRequirement:someAncestorWantsLayer:] + 111713 com.apple.AppKit 0x00007fff2a188c90 -[NSView buildLayerTreeWithOwnLayerRequirement:someAncestorWantsLayer:] + 111714 com.apple.AppKit 0x00007fff2a1887df -[NSView buildLayerTree] + 46615 com.apple.AppKit 0x00007fff2a18841d NSViewBuildLayerTreeForDisplay + 4716 com.apple.AppKit 0x00007fff2a188355 -[NSWindow displayIfNeeded] + 19117 com.apple.AppKit 0x00007fff2a1881ef NSWindowGetDisplayCycleObserverForDisplayblockinvoke + 64618 com.apple.AppKit 0x00007fff2a183cc8 NSDisplayCycleObserverInvoke + 15519 com.apple.AppKit 0x00007fff2a18388f NSDisplayCycleFlush + 97720 com.apple.QuartzCore 0x00007fff386d4c6e CA::Transaction::runcommithandlers(CATransactionPhase) + 10021 com.apple.QuartzCore 0x00007fff386d45c0 CA::Transaction::commit() + 224