Dot in Component Reference should not be used?

In KiCad 5.1.10 I used Reference X1.1, X1.2 .. X.nn for contact set of 1-pin compoments - connectors. In KiCad 5.99 I can't update pcb in case when dot in Reference: After run Update PCB from Schematic "Update PCB from Schematic" window does not appear. This style is used in shematic oftenly, for xample S1.1 or S1.2 for switches etc. Or dot in reference prohibited or reserved and I should use other symbol, for example X1-1, X1-2, etc?

Steps to reproduce

1. Place any two components on the schemapit page and name them X1.1 and X1.2 - (- exactly, because other numbers may work ok).
2. Run Update PCB from schematic from Schematic Editor or from PCB editor.
3. Nothing updaed.

KiCad Version

Application: KiCad Schematic Editor (64-bit)

Version: (5.99.0-12071-g0463fc4c2b), release build

Libraries:
	wxWidgets 3.1.5
	libcurl/7.74.0-DEV Schannel zlib/1.2.11

Platform: Windows 10 (build 19042), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: Aug 24 2021 08:59:20
	wxWidgets: 3.1.5 (wchar_t,STL containers)
	Boost: 1.76.0
	OCC: 7.5.0
	Curl: 7.74.0-DEV
	ngspice: 34
	Compiler: Visual C++ 1928 without C++ ABI

Build settings:
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON