Eeschema 5.99-> The component fields disappear when I click LBM.

Description

I state that I have searched among the problems but I have not found a similar one. When I go to change the field of a component as I click with the mouse it disappears.

I thought it was my general dark theme that gave this problem in fact I changed the theme without closing kicad and the problem didn't occur anymore.

Then restarting kicad even with the general theme clear the text disappears.

Under windows10 this does not happen.

I have linux mint 2020.

See video:

2020-12-08_19-26-50

Steps to reproduce

1. Open schematic file
2. Press 'e' over component
3. LMB on field
4. text disappers

KiCad Version

Application: Eeschema

Version: 5.99.0-unknown-9407e6dc8~106~ubuntu20.04.1, release build

Libraries:
	wxWidgets 3.0.4
	libcurl/7.68.0 OpenSSL/1.1.1f zlib/1.2.11 brotli/1.0.7 libidn2/2.2.0 libpsl/0.21.0 (+libidn2/2.2.0) libssh/0.9.3/openssl/zlib nghttp2/1.40.0 librtmp/2.3

Platform: Linux 5.4.0-56-generic x86_64, 64 bit, Little endian, wxGTK, mate, x11

Build Info:
	Date: Dec  8 2020 10:47:11
	wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8) GTK+ 3.24
	Boost: 1.71.0
	OCC: 7.3.0
	Curl: 7.68.0
	ngspice: 31
	Compiler: GCC 9.3.0 with C++ ABI 1013

Build settings:
	KICAD_SCRIPTING=ON
	KICAD_SCRIPTING_MODULES=ON
	KICAD_SCRIPTING_PYTHON3=ON
	KICAD_SCRIPTING_WXPYTHON=ON
	KICAD_SCRIPTING_WXPYTHON_PHOENIX=ON
	KICAD_SCRIPTING_ACTION_MENU=ON
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON