PNS Meander placer is creating spurious straight tracks

Description

The meander seems to break connectivity by adding straight track segments at random places in between, which means you can no longer "Select/Expand Connection (U)". Also if you try to place another Meander in the same route, the net length calculation is wrong.

Steps to reproduce

meanders

KiCad Version

Application: KiCad PCB Editor

Version: (5.99.0-10221-ga30894e5a1), debug build

Libraries:
	wxWidgets 3.1.4
	libcurl/7.72.0-DEV Schannel zlib/1.2.11

Platform: Windows 10 (build 19041), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: Apr 11 2021 14:43:15
	wxWidgets: 3.1.4 (wchar_t,STL containers)
	Boost: 1.73.0
	OCC: 7.4.0
	Curl: 7.72.0-DEV
	ngspice: 32
	Compiler: Visual C++ 1928 without C++ ABI

Build settings:
	KICAD_SCRIPTING=OFF
	KICAD_SCRIPTING_MODULES=OFF
	KICAD_SCRIPTING_PYTHON3=OFF
	KICAD_SCRIPTING_WXPYTHON=OFF
	KICAD_SCRIPTING_WXPYTHON_PHOENIX=OFF
	KICAD_SCRIPTING_ACTION_MENU=OFF
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON
	KICAD_STDLIB_DEBUG=OFF
	KICAD_STDLIB_LIGHT_DEBUG=OFF
	KICAD_SANITIZE=OFF