Altium sch: ""Intersheet references" always visible for imported ports

Description

Steps to reproduce

1. Import https://github.com/spacelab-ufsc/ttc2/blob/c963484cfd963575df19387040782c6b949b5d92/hardware/sources/6_radio_1.schdoc
2. See harness connector names imported in the left top corner;

KiCad Version

Application: KiCad Schematic Editor (64-bit)

Version: (6.99.0-2776-g4423755176), release build

Libraries:
	wxWidgets 3.1.7
	FreeType 2.11.1
	HarfBuzz 4.2.0
	FontConfig 2.14.0
	libcurl/7.83.1-DEV Schannel zlib/1.2.12

Platform: Windows 10 (build 19044), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: Aug  8 2022 07:22:08
	wxWidgets: 3.1.7 (wchar_t,wx containers)
	Boost: 1.79.0
	OCC: 7.6.0
	Curl: 7.83.1-DEV
	ngspice: 37
	Compiler: Visual C++ 1929 without C++ ABI

Build settings:
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON